Merge tag 'platform-drivers-x86-v4.13-1' of git://git.infradead.org/linux-platform-drivers-x86

Pull x86 platform driver updates from Darren Hart:
 "Introduce new bus architecture for WMI and expose BMOF data through
  sysfs. Correct several assumptions about WMI instance number from 1 to
  0. Further fujitsu-laptop cleanups, continuing to prepare for
  separation into two modules. Add support for several new ideapad
  laptops and silead-based tablets. Various minor fixes and const
  cleanups.

  Detail summary:

  sony-laptop:
   - constify attribute_group and input index array

  fujitsu-laptop:
   - rework debugging
   - do not evaluate ACPI _INI methods
   - do not update ACPI device power status
   - sanitize hotkey input device identification
   - use strcpy to set ACPI device names and classes
   - remove redundant safety checks
   - use device-specific data in remaining module code
   - use device-specific data in LED-related code
   - explicitly pass ACPI device to call_fext_func()
   - track the last instantiated FUJ02E3 ACPI device
   - allocate fujitsu_laptop in acpi_fujitsu_laptop_add()
   - use device-specific data in backlight code
   - allocate fujitsu_bl in acpi_fujitsu_bl_add()
   - distinguish current uses of device-specific data

  msi-laptop:
   - constify msipf*_attribute_group

  eeepc-laptop:
   - constify platform_attribute_group

  toshiba_haps:
   - constify haps_attr_group

  dell-wmi-led:
   - Adjust instance of wmi_evaluate_method calls to 0

  alienware-wmi:
   - Adjust instance of wmi_evaluate_method calls to 0

  intel_menlow:
   - Add const to thermal_cooling_device_ops structure

  acerhdf:
   - Add const to thermal_cooling_device_ops structure

  dell-laptop:
   - Fix bogus keyboard backlight sysfs interface

  acer-wmi:
   - Using zero as first WMI instance number
   - Detect RF Button capability

  ideapad-laptop:
   - Add Y720-15IKBN to no_hw_rfkill
   - Add Y520-15IKBN to no_hw_rfkill
   - constify rfkill_ops structure
   - Squelch ACPI event 1
   - hide unused 'touchpad_store'
   - Switch touchpad attribute to be RO
   - Add sysfs interface for touchpad state

  silead_dmi:
   - Add touchscreen info for PoV mobii wintab p800w
   - Add touchscreen info for Pipo W2S tablet
   - Add touchscreen info for GP-electronic T701

  dell-rbtn:
   - constify rfkill_ops structures
   - Improve explanation about DELLABC6

  samsung-laptop:
   - constify rfkill_ops structures

  panasonic-laptop:
   - remove unused code

  samsung-laptop:
   - Initialize loca variable

  dell-wmi:
   - Convert to the WMI bus infrastructure
   - Add a better description for "stealth mode"
   - Add a comment explaining the 0xb2 magic number

  wmi-bmof:
   - New driver to expose embedded Binary WMI MOF metadata

  wmi*:
   - Fix printing info about WDG structure
   - Add recent copyright statements
   - Require query for data blocks, rename writable to setable
   - Add an interface for subdrivers to access sibling devices
   - Bind the platform device, not the ACPI node
   - Add a new interface to read block data
   - Incorporate acpi_install_notify_handler
   - Instantiate all devices before adding them
   - Probe data objects for read and write capabilities
   - Split devices into types and add basic sysfs attributes
   - Fix error handling when creating devices
   - Turn WMI into a bus driver
   - Track wmi devices per ACPI device
   - Clean up acpi_wmi_add
   - Pass the acpi_device through to parse_wdg
   - Drop "Mapper (un)loaded" messages

  intel_cht_int33fe:
   - Set supplied-from property on max17047 dev

  intel_pmc_ipc:
   - Mark ipc_data_readb() as __maybe_unused

  topstar-laptop:
   - Add new device id

  peaq-wmi:
   - Add new peaq-wmi driver

  thinkpad_acpi:
   - Add a comment about 0 in module_param_call()
   - Join string literals back

  toshiba_acpi:
   - use memdup_user_nul"

* tag 'platform-drivers-x86-v4.13-1' of git://git.infradead.org/linux-platform-drivers-x86: (67 commits)
  platform/x86: sony-laptop: constify attribute_group and input index array
  platform/x86: fujitsu-laptop: rework debugging
  platform/x86: fujitsu-laptop: do not evaluate ACPI _INI methods
  platform/x86: fujitsu-laptop: do not update ACPI device power status
  platform/x86: fujitsu-laptop: sanitize hotkey input device identification
  platform/x86: fujitsu-laptop: use strcpy to set ACPI device names and classes
  platform/x86: fujitsu-laptop: remove redundant safety checks
  platform/x86: msi-laptop: constify msipf*_attribute_group
  platform/x86: eeepc-laptop: constify platform_attribute_group
  platform/x86: toshiba_haps: constify haps_attr_group
  platform/x86: dell-wmi-led: Adjust instance of wmi_evaluate_method calls to 0
  platform/x86: alienware-wmi: Adjust instance of wmi_evaluate_method calls to 0
  platform/x86: intel_menlow: Add const to thermal_cooling_device_ops structure
  platform/x86: acerhdf: Add const to thermal_cooling_device_ops structure
  platform/x86: dell-laptop: Fix bogus keyboard backlight sysfs interface
  platform/x86: acer-wmi: Using zero as first WMI instance number
  platform/x86: ideapad-laptop: Add Y720-15IKBN to no_hw_rfkill
  platform/x86: ideapad-laptop: Add Y520-15IKBN to no_hw_rfkill
  platform/x86: silead_dmi: Add touchscreen info for PoV mobii wintab p800w
  platform/x86: silead_dmi: Add touchscreen info for Pipo W2S tablet
  ...

Documentation/ABI/testing/sysfs-platform-ideapad-laptop

@@ -17,3 +17,11 @@ Description:
 			* 2 -> Dust Cleaning
 			* 4 -> Efficient Thermal Dissipation Mode
 
+What:		/sys/devices/platform/ideapad/touchpad
+Date:		May 2017
+KernelVersion:	4.13
+Contact:	"Ritesh Raj Sarraf <rrs@debian.org>"
+Description:
+		Control touchpad mode.
+			* 1 -> Switched On
+			* 0 -> Switched Off

drivers/platform/x86/Kconfig

@@ -195,16 +195,6 @@ config FUJITSU_LAPTOP
 
 	  If you have a Fujitsu laptop, say Y or M here.
 
-config FUJITSU_LAPTOP_DEBUG
-	bool "Verbose debug mode for Fujitsu Laptop Extras"
-	depends on FUJITSU_LAPTOP
-	default n
-	---help---
-	  Enables extra debug output from the fujitsu extras driver, at the
-	  expense of a slight increase in driver size.
-
-	  If you are not sure, say N here.
-
 config FUJITSU_TABLET
        tristate "Fujitsu Tablet Extras"
        depends on ACPI
@@ -656,6 +646,18 @@ config ACPI_WMI
 	  It is safe to enable this driver even if your DSDT doesn't define
 	  any ACPI-WMI devices.
 
+config WMI_BMOF
+	tristate "WMI embedded Binary MOF driver"
+	depends on ACPI_WMI
+	default ACPI_WMI
+	---help---
+	  Say Y here if you want to be able to read a firmware-embedded
+	  WMI Binary MOF data. Using this requires userspace tools and may be
+	  rather tedious.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called wmi-bmof.
+
 config MSI_WMI
 	tristate "MSI WMI extras"
 	depends on ACPI_WMI
@@ -669,6 +671,13 @@ config MSI_WMI
 	 To compile this driver as a module, choose M here: the module will
 	 be called msi-wmi.
 
+config PEAQ_WMI
+	tristate "PEAQ 2-in-1 WMI hotkey driver"
+	depends on ACPI_WMI
+	depends on INPUT
+	help
+	 Say Y here if you want to support WMI-based hotkeys on PEAQ 2-in-1s.
+
 config TOPSTAR_LAPTOP
 	tristate "Topstar Laptop Extras"
 	depends on ACPI

drivers/platform/x86/Makefile

@@ -35,8 +35,10 @@ obj-$(CONFIG_PANASONIC_LAPTOP)	+= panasonic-laptop.o
 obj-$(CONFIG_INTEL_MENLOW)	+= intel_menlow.o
 obj-$(CONFIG_ACPI_WMI)		+= wmi.o
 obj-$(CONFIG_MSI_WMI)		+= msi-wmi.o
+obj-$(CONFIG_PEAQ_WMI)		+= peaq-wmi.o
 obj-$(CONFIG_SURFACE3_WMI)	+= surface3-wmi.o
 obj-$(CONFIG_TOPSTAR_LAPTOP)	+= topstar-laptop.o
+obj-$(CONFIG_WMI_BMOF)		+= wmi-bmof.o
 
 # toshiba_acpi must link after wmi to ensure that wmi devices are found
 # before toshiba_acpi initializes

drivers/platform/x86/acer-wmi.c

@@ -149,6 +149,8 @@ struct event_return_value {
 #define ACER_WMID3_GDS_THREEG		(1<<6)	/* 3G */
 #define ACER_WMID3_GDS_WIMAX		(1<<7)	/* WiMAX */
 #define ACER_WMID3_GDS_BLUETOOTH	(1<<11)	/* BT */
+#define ACER_WMID3_GDS_RFBTN		(1<<14)	/* RF Button */
+
 #define ACER_WMID3_GDS_TOUCHPAD		(1<<1)	/* Touchpad */
 
 /* Hotkey Customized Setting and Acer Application Status.
@@ -221,6 +223,7 @@ struct hotkey_function_type_aa {
 #define ACER_CAP_BRIGHTNESS		(1<<3)
 #define ACER_CAP_THREEG			(1<<4)
 #define ACER_CAP_ACCEL			(1<<5)
+#define ACER_CAP_RFBTN			(1<<6)
 #define ACER_CAP_ANY			(0xFFFFFFFF)
 
 /*
@@ -700,7 +703,7 @@ struct acpi_buffer *result)
 	input.length = sizeof(struct wmab_args);
 	input.pointer = (u8 *)regbuf;
 
-	status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
+	status = wmi_evaluate_method(AMW0_GUID1, 0, 1, &input, result);
 
 	return status;
 }
@@ -965,7 +968,7 @@ WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 	u32 tmp = 0;
 	acpi_status status;
 
-	status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
+	status = wmi_evaluate_method(WMID_GUID1, 0, method_id, &input, &result);
 
 	if (ACPI_FAILURE(status))
 		return status;
@@ -1264,6 +1267,10 @@ static void __init type_aa_dmi_decode(const struct dmi_header *header, void *d)
 		interface->capability |= ACER_CAP_THREEG;
 	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
 		interface->capability |= ACER_CAP_BLUETOOTH;
+	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_RFBTN) {
+		interface->capability |= ACER_CAP_RFBTN;
+		commun_func_bitmap &= ~ACER_WMID3_GDS_RFBTN;
+	}
 
 	commun_fn_key_number = type_aa->commun_fn_key_number;
 }
@@ -1275,7 +1282,7 @@ static acpi_status __init WMID_set_capabilities(void)
 	acpi_status status;
 	u32 devices;
 
-	status = wmi_query_block(WMID_GUID2, 1, &out);
+	status = wmi_query_block(WMID_GUID2, 0, &out);
 	if (ACPI_FAILURE(status))
 		return status;
 
@@ -2018,7 +2025,7 @@ static u32 get_wmid_devices(void)
 	acpi_status status;
 	u32 devices = 0;
 
-	status = wmi_query_block(WMID_GUID2, 1, &out);
+	status = wmi_query_block(WMID_GUID2, 0, &out);
 	if (ACPI_FAILURE(status))
 		return 0;
 

drivers/platform/x86/acerhdf.c

@@ -557,7 +557,7 @@ static int acerhdf_set_cur_state(struct thermal_cooling_device *cdev,
 }
 
 /* bind fan callbacks to fan device */
-static struct thermal_cooling_device_ops acerhdf_cooling_ops = {
+static const struct thermal_cooling_device_ops acerhdf_cooling_ops = {
 	.get_max_state = acerhdf_get_max_state,
 	.get_cur_state = acerhdf_get_cur_state,
 	.set_cur_state = acerhdf_set_cur_state,

drivers/platform/x86/alienware-wmi.c

@@ -303,7 +303,7 @@ static int alienware_update_led(struct platform_zone *zone)
 	}
 	pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
 
-	status = wmi_evaluate_method(guid, 1, method_id, &input, NULL);
+	status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
 	if (ACPI_FAILURE(status))
 		pr_err("alienware-wmi: zone set failure: %u\n", status);
 	return ACPI_FAILURE(status);
@@ -352,7 +352,7 @@ static int wmax_brightness(int brightness)
 	};
 	input.length = (acpi_size) sizeof(args);
 	input.pointer = &args;
-	status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+	status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 				     WMAX_METHOD_BRIGHTNESS, &input, NULL);
 	if (ACPI_FAILURE(status))
 		pr_err("alienware-wmi: brightness set failure: %u\n", status);
@@ -506,10 +506,10 @@ static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
 	if (out_data != NULL) {
 		output.length = ACPI_ALLOCATE_BUFFER;
 		output.pointer = NULL;
-		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 					     command, &input, &output);
 	} else
-		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 					     command, &input, NULL);
 
 	if (ACPI_SUCCESS(status) && out_data != NULL) {

drivers/platform/x86/dell-laptop.c

@@ -1510,7 +1510,11 @@ static void kbd_init(void)
 	ret = kbd_init_info();
 	kbd_init_tokens();
 
-	if (kbd_token_bits != 0 || ret == 0)
+	/*
+	 * Only supports keyboard backlight when it has at least two modes.
+	 */
+	if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2))
+	    || kbd_get_valid_token_counts() >= 2)
 		kbd_led_present = true;
 }
 

drivers/platform/x86/dell-rbtn.c

@@ -110,7 +110,7 @@ static int rbtn_rfkill_set_block(void *data, bool blocked)
 	return -EINVAL;
 }
 
-static struct rfkill_ops rbtn_ops = {
+static const struct rfkill_ops rbtn_ops = {
 	.query = rbtn_rfkill_query,
 	.set_block = rbtn_rfkill_set_block,
 };
@@ -221,16 +221,27 @@ static const struct acpi_device_id rbtn_ids[] = {
 
 	/*
 	 * This driver can also handle the "DELLABC6" device that
-	 * appears on the XPS 13 9350, but that device is disabled
-	 * by the DSDT unless booted with acpi_osi="!Windows 2012"
-	 * acpi_osi="!Windows 2013".  Even if we boot that and bind
-	 * the driver, we seem to have inconsistent behavior in
-	 * which NetworkManager can get out of sync with the rfkill
-	 * state.
+	 * appears on the XPS 13 9350, but that device is disabled by
+	 * the DSDT unless booted with acpi_osi="!Windows 2012"
+	 * acpi_osi="!Windows 2013".
 	 *
-	 * On the XPS 13 9350 and similar laptops, we're not supposed to
-	 * use DELLABC6 at all.  Instead, we handle the rfkill button
-	 * via the intel-hid driver.
+	 * According to Mario at Dell:
+	 *
+	 *  DELLABC6 is a custom interface that was created solely to
+	 *  have airplane mode support for Windows 7.  For Windows 10
+	 *  the proper interface is to use that which is handled by
+	 *  intel-hid. A OEM airplane mode driver is not used.
+	 *
+	 *  Since the kernel doesn't identify as Windows 7 it would be
+	 *  incorrect to do attempt to use that interface.
+	 *
+	 * Even if we override _OSI and bind to DELLABC6, we end up with
+	 * inconsistent behavior in which userspace can get out of sync
+	 * with the rfkill state as it conflicts with events from
+	 * intel-hid.
+	 *
+	 * The upshot is that it is better to just ignore DELLABC6
+	 * devices.
 	 */
 
 	{ "", 0 },

drivers/platform/x86/dell-wmi-led.c

@@ -68,7 +68,7 @@ static int dell_led_perform_fn(u8 length, u8 result_code, u8 device_id,
 	input.length = sizeof(struct bios_args);
 	input.pointer = &args;
 
-	status = wmi_evaluate_method(DELL_LED_BIOS_GUID, 1, 1, &input, &output);
+	status = wmi_evaluate_method(DELL_LED_BIOS_GUID, 0, 1, &input, &output);
 	if (ACPI_FAILURE(status))
 		return status;
 

drivers/platform/x86/dell-wmi.c

@@ -36,6 +36,7 @@
 #include <linux/acpi.h>
 #include <linux/string.h>
 #include <linux/dmi.h>
+#include <linux/wmi.h>
 #include <acpi/video.h>
 #include "dell-smbios.h"
 
@@ -53,6 +54,10 @@ static bool wmi_requires_smbios_request;
 MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
 MODULE_ALIAS("wmi:"DELL_DESCRIPTOR_GUID);
 
+struct dell_wmi_priv {
+	struct input_dev *input_dev;
+};
+
 static int __init dmi_matched(const struct dmi_system_id *dmi)
 {
 	wmi_requires_smbios_request = 1;
@@ -86,7 +91,7 @@ static const struct dmi_system_id dell_wmi_smbios_list[] __initconst = {
  * notifications (rather than requests for change) or are also sent
  * via the keyboard controller so should not be sent again.
  */
-static const struct key_entry dell_wmi_keymap_type_0000[] __initconst = {
+static const struct key_entry dell_wmi_keymap_type_0000[] = {
 	{ KE_IGNORE, 0x003a, { KEY_CAPSLOCK } },
 
 	/* Key code is followed by brightness level */
@@ -207,7 +212,7 @@ struct dell_dmi_results {
 };
 
 /* Uninitialized entries here are KEY_RESERVED == 0. */
-static const u16 bios_to_linux_keycode[256] __initconst = {
+static const u16 bios_to_linux_keycode[256] = {
 	[0]	= KEY_MEDIA,
 	[1]	= KEY_NEXTSONG,
 	[2]	= KEY_PLAYPAUSE,
@@ -256,7 +261,7 @@ static const u16 bios_to_linux_keycode[256] __initconst = {
  * These are applied if the 0xB2 DMI hotkey table is present and doesn't
  * override them.
  */
-static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = {
+static const struct key_entry dell_wmi_keymap_type_0010[] = {
 	/* Fn-lock */
 	{ KE_IGNORE, 0x151, { KEY_RESERVED } },
 
@@ -272,7 +277,12 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = {
 	/* RGB keyboard backlight control */
 	{ KE_IGNORE, 0x154, { KEY_RESERVED } },
 
-	/* Stealth mode toggle */
+	/*
+	 * Stealth mode toggle. This will "disable all lights and sounds".
+	 * The action is performed by the BIOS and EC; the WMI event is just
+	 * a notification. On the XPS 13 9350, this is Fn+F7, and there's
+	 * a BIOS setting to enable and disable the hotkey.
+	 */
 	{ KE_IGNORE, 0x155, { KEY_RESERVED } },
 
 	/* Rugged magnetic dock attach/detach events */
@@ -289,7 +299,7 @@ static const struct key_entry dell_wmi_keymap_type_0010[] __initconst = {
 /*
  * Keymap for WMI events of type 0x0011
  */
-static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = {
+static const struct key_entry dell_wmi_keymap_type_0011[] = {
 	/* Battery unplugged */
 	{ KE_IGNORE, 0xfff0, { KEY_RESERVED } },
 
@@ -304,13 +314,12 @@ static const struct key_entry dell_wmi_keymap_type_0011[] __initconst = {
 	{ KE_IGNORE, 0x02f6, { KEY_RESERVED } },
 };
 
-static struct input_dev *dell_wmi_input_dev;
-
-static void dell_wmi_process_key(int type, int code)
+static void dell_wmi_process_key(struct wmi_device *wdev, int type, int code)
 {
+	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
 	const struct key_entry *key;
 
-	key = sparse_keymap_entry_from_scancode(dell_wmi_input_dev,
+	key = sparse_keymap_entry_from_scancode(priv->input_dev,
 						(type << 16) | code);
 	if (!key) {
 		pr_info("Unknown key with type 0x%04x and code 0x%04x pressed\n",
@@ -333,33 +342,18 @@ static void dell_wmi_process_key(int type, int code)
 		dell_laptop_call_notifier(
 			DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED, NULL);
 
-	sparse_keymap_report_entry(dell_wmi_input_dev, key, 1, true);
+	sparse_keymap_report_entry(priv->input_dev, key, 1, true);
 }
 
-static void dell_wmi_notify(u32 value, void *context)
+static void dell_wmi_notify(struct wmi_device *wdev,
+			    union acpi_object *obj)
 {
-	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
-	union acpi_object *obj;
-	acpi_status status;
-	acpi_size buffer_size;
 	u16 *buffer_entry, *buffer_end;
+	acpi_size buffer_size;
 	int len, i;
 
-	status = wmi_get_event_data(value, &response);
-	if (status != AE_OK) {
-		pr_warn("bad event status 0x%x\n", status);
-		return;
-	}
-
-	obj = (union acpi_object *)response.pointer;
-	if (!obj) {
-		pr_warn("no response\n");
-		return;
-	}
-
 	if (obj->type != ACPI_TYPE_BUFFER) {
 		pr_warn("bad response type %x\n", obj->type);
-		kfree(obj);
 		return;
 	}
 
@@ -404,13 +398,14 @@ static void dell_wmi_notify(u32 value, void *context)
 		switch (buffer_entry[1]) {
 		case 0x0000: /* One key pressed or event occurred */
 			if (len > 2)
-				dell_wmi_process_key(0x0000, buffer_entry[2]);
+				dell_wmi_process_key(wdev, 0x0000,
+						     buffer_entry[2]);
 			/* Other entries could contain additional information */
 			break;
 		case 0x0010: /* Sequence of keys pressed */
 		case 0x0011: /* Sequence of events occurred */
 			for (i = 2; i < len; ++i)
-				dell_wmi_process_key(buffer_entry[1],
+				dell_wmi_process_key(wdev, buffer_entry[1],
 						     buffer_entry[i]);
 			break;
 		default: /* Unknown event */
@@ -423,7 +418,6 @@ static void dell_wmi_notify(u32 value, void *context)
 
 	}
 
-	kfree(obj);
 }
 
 static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
@@ -437,9 +431,7 @@ static bool have_scancode(u32 scancode, const struct key_entry *keymap, int len)
 	return false;
 }
 
-static void __init handle_dmi_entry(const struct dmi_header *dm,
-				    void *opaque)
-
+static void handle_dmi_entry(const struct dmi_header *dm, void *opaque)
 {
 	struct dell_dmi_results *results = opaque;
 	struct dell_bios_hotkey_table *table;
@@ -449,6 +441,7 @@ static void __init handle_dmi_entry(const struct dmi_header *dm,
 	if (results->err || results->keymap)
 		return;		/* We already found the hotkey table. */
 
+	/* The Dell hotkey table is type 0xB2.  Scan until we find it. */
 	if (dm->type != 0xb2)
 		return;
 
@@ -509,19 +502,20 @@ static void __init handle_dmi_entry(const struct dmi_header *dm,
 	results->keymap_size = pos;
 }
 
-static int __init dell_wmi_input_setup(void)
+static int dell_wmi_input_setup(struct wmi_device *wdev)
 {
+	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
 	struct dell_dmi_results dmi_results = {};
 	struct key_entry *keymap;
 	int err, i, pos = 0;
 
-	dell_wmi_input_dev = input_allocate_device();
-	if (!dell_wmi_input_dev)
+	priv->input_dev = input_allocate_device();
+	if (!priv->input_dev)
 		return -ENOMEM;
 
-	dell_wmi_input_dev->name = "Dell WMI hotkeys";
-	dell_wmi_input_dev->phys = "wmi/input0";
-	dell_wmi_input_dev->id.bustype = BUS_HOST;
+	priv->input_dev->name = "Dell WMI hotkeys";
+	priv->input_dev->id.bustype = BUS_HOST;
+	priv->input_dev->dev.parent = &wdev->dev;
 
 	if (dmi_walk(handle_dmi_entry, &dmi_results)) {
 		/*
@@ -596,7 +590,7 @@ static int __init dell_wmi_input_setup(void)
 
 	keymap[pos].type = KE_END;
 
-	err = sparse_keymap_setup(dell_wmi_input_dev, keymap, NULL);
+	err = sparse_keymap_setup(priv->input_dev, keymap, NULL);
 	/*
 	 * Sparse keymap library makes a copy of keymap so we don't need the
 	 * original one that was allocated.
@@ -605,17 +599,24 @@ static int __init dell_wmi_input_setup(void)
 	if (err)
 		goto err_free_dev;
 
-	err = input_register_device(dell_wmi_input_dev);
+	err = input_register_device(priv->input_dev);
 	if (err)
 		goto err_free_dev;
 
 	return 0;
 
  err_free_dev:
-	input_free_device(dell_wmi_input_dev);
+	input_free_device(priv->input_dev);
 	return err;
 }
 
+static void dell_wmi_input_destroy(struct wmi_device *wdev)
+{
+	struct dell_wmi_priv *priv = dev_get_drvdata(&wdev->dev);
+
+	input_unregister_device(priv->input_dev);
+}
+
 /*
  * Descriptor buffer is 128 byte long and contains:
  *
@@ -714,46 +715,55 @@ static int dell_wmi_events_set_enabled(bool enable)
 	return dell_smbios_error(ret);
 }
 
+static int dell_wmi_probe(struct wmi_device *wdev)
+{
+	struct dell_wmi_priv *priv = devm_kzalloc(
+		&wdev->dev, sizeof(struct dell_wmi_priv), GFP_KERNEL);
+
+	dev_set_drvdata(&wdev->dev, priv);
+
+	return dell_wmi_input_setup(wdev);
+}
+
+static int dell_wmi_remove(struct wmi_device *wdev)
+{
+	dell_wmi_input_destroy(wdev);
+	return 0;
+}
+static const struct wmi_device_id dell_wmi_id_table[] = {
+	{ .guid_string = DELL_EVENT_GUID },
+	{ },
+};
+
+static struct wmi_driver dell_wmi_driver = {
+	.driver = {
+		.name = "dell-wmi",
+	},
+	.id_table = dell_wmi_id_table,
+	.probe = dell_wmi_probe,
+	.remove = dell_wmi_remove,
+	.notify = dell_wmi_notify,
+};
+
 static int __init dell_wmi_init(void)
 {
 	int err;
-	acpi_status status;
-
-	if (!wmi_has_guid(DELL_EVENT_GUID) ||
-	    !wmi_has_guid(DELL_DESCRIPTOR_GUID)) {
-		pr_warn("Dell WMI GUID were not found\n");
-		return -ENODEV;
-	}
 
 	err = dell_wmi_check_descriptor_buffer();
 	if (err)
 		return err;
 
-	err = dell_wmi_input_setup();
-	if (err)
-		return err;
-
-	status = wmi_install_notify_handler(DELL_EVENT_GUID,
-					 dell_wmi_notify, NULL);
-	if (ACPI_FAILURE(status)) {
-		input_unregister_device(dell_wmi_input_dev);
-		pr_err("Unable to register notify handler - %d\n", status);
-		return -ENODEV;
-	}
-
 	dmi_check_system(dell_wmi_smbios_list);
 
 	if (wmi_requires_smbios_request) {
 		err = dell_wmi_events_set_enabled(true);
 		if (err) {
 			pr_err("Failed to enable WMI events\n");
-			wmi_remove_notify_handler(DELL_EVENT_GUID);
-			input_unregister_device(dell_wmi_input_dev);
 			return err;
 		}
 	}
 
-	return 0;
+	return wmi_driver_register(&dell_wmi_driver);
 }
 module_init(dell_wmi_init);
 
@@ -761,7 +771,7 @@ static void __exit dell_wmi_exit(void)
 {
 	if (wmi_requires_smbios_request)
 		dell_wmi_events_set_enabled(false);
-	wmi_remove_notify_handler(DELL_EVENT_GUID);
-	input_unregister_device(dell_wmi_input_dev);
+
+	wmi_driver_unregister(&dell_wmi_driver);
 }
 module_exit(dell_wmi_exit);

drivers/platform/x86/eeepc-laptop.c

@@ -445,7 +445,7 @@ static struct attribute *platform_attributes[] = {
 	NULL
 };
 
-static struct attribute_group platform_attribute_group = {
+static const struct attribute_group platform_attribute_group = {
 	.attrs = platform_attributes
 };
 

drivers/platform/x86/fujitsu-laptop.c

@@ -112,25 +112,8 @@
 #define MAX_HOTKEY_RINGBUFFER_SIZE 100
 #define RINGBUFFERSIZE 40
 
-/* Debugging */
-#define FUJLAPTOP_DBG_ERROR	  0x0001
-#define FUJLAPTOP_DBG_WARN	  0x0002
-#define FUJLAPTOP_DBG_INFO	  0x0004
-#define FUJLAPTOP_DBG_TRACE	  0x0008
-
-#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
-#define vdbg_printk(a_dbg_level, format, arg...) \
-	do { if (dbg_level & a_dbg_level) \
-		printk(KERN_DEBUG pr_fmt("%s: " format), __func__, ## arg); \
-	} while (0)
-#else
-#define vdbg_printk(a_dbg_level, format, arg...) \
-	do { } while (0)
-#endif
-
 /* Device controlling the backlight and associated keys */
 struct fujitsu_bl {
-	acpi_handle acpi_handle;
 	struct input_dev *input;
 	char phys[32];
 	struct backlight_device *bl_device;
@@ -144,8 +127,6 @@ static bool disable_brightness_adjust;
 
 /* Device used to access hotkeys and other features on the laptop */
 struct fujitsu_laptop {
-	acpi_handle acpi_handle;
-	struct acpi_device *dev;
 	struct input_dev *input;
 	char phys[32];
 	struct platform_device *pf_device;
@@ -155,15 +136,12 @@ struct fujitsu_laptop {
 	int flags_state;
 };
 
-static struct fujitsu_laptop *fujitsu_laptop;
-
-#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
-static u32 dbg_level = 0x03;
-#endif
+static struct acpi_device *fext;
 
 /* Fujitsu ACPI interface function */
 
-static int call_fext_func(int func, int op, int feature, int state)
+static int call_fext_func(struct acpi_device *device,
+			  int func, int op, int feature, int state)
 {
 	union acpi_object params[4] = {
 		{ .integer.type = ACPI_TYPE_INTEGER, .integer.value = func },
@@ -175,28 +153,30 @@ static int call_fext_func(int func, int op, int feature, int state)
 	unsigned long long value;
 	acpi_status status;
 
-	status = acpi_evaluate_integer(fujitsu_laptop->acpi_handle, "FUNC",
-				       &arg_list, &value);
+	status = acpi_evaluate_integer(device->handle, "FUNC", &arg_list,
+				       &value);
 	if (ACPI_FAILURE(status)) {
-		vdbg_printk(FUJLAPTOP_DBG_ERROR, "Failed to evaluate FUNC\n");
+		acpi_handle_err(device->handle, "Failed to evaluate FUNC\n");
 		return -ENODEV;
 	}
 
-	vdbg_printk(FUJLAPTOP_DBG_TRACE, "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
-		    func, op, feature, state, (int)value);
+	acpi_handle_debug(device->handle,
+			  "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
+			  func, op, feature, state, (int)value);
 	return value;
 }
 
 /* Hardware access for LCD brightness control */
 
-static int set_lcd_level(int level)
+static int set_lcd_level(struct acpi_device *device, int level)
 {
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	acpi_status status;
 	char *method;
 
 	switch (use_alt_lcd_levels) {
 	case -1:
-		if (acpi_has_method(fujitsu_bl->acpi_handle, "SBL2"))
+		if (acpi_has_method(device->handle, "SBL2"))
 			method = "SBL2";
 		else
 			method = "SBLL";
@@ -209,74 +189,77 @@ static int set_lcd_level(int level)
 		break;
 	}
 
-	vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via %s [%d]\n",
-		    method, level);
+	acpi_handle_debug(device->handle, "set lcd level via %s [%d]\n", method,
+			  level);
 
-	if (level < 0 || level >= fujitsu_bl->max_brightness)
+	if (level < 0 || level >= priv->max_brightness)
 		return -EINVAL;
 
-	status = acpi_execute_simple_method(fujitsu_bl->acpi_handle, method,
-					    level);
+	status = acpi_execute_simple_method(device->handle, method, level);
 	if (ACPI_FAILURE(status)) {
-		vdbg_printk(FUJLAPTOP_DBG_ERROR, "Failed to evaluate %s\n",
-			    method);
+		acpi_handle_err(device->handle, "Failed to evaluate %s\n",
+				method);
 		return -ENODEV;
 	}
 
-	fujitsu_bl->brightness_level = level;
+	priv->brightness_level = level;
 
 	return 0;
 }
 
-static int get_lcd_level(void)
+static int get_lcd_level(struct acpi_device *device)
 {
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	unsigned long long state = 0;
 	acpi_status status = AE_OK;
 
-	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLL\n");
+	acpi_handle_debug(device->handle, "get lcd level via GBLL\n");
 
-	status = acpi_evaluate_integer(fujitsu_bl->acpi_handle, "GBLL", NULL,
-				       &state);
+	status = acpi_evaluate_integer(device->handle, "GBLL", NULL, &state);
 	if (ACPI_FAILURE(status))
 		return 0;
 
-	fujitsu_bl->brightness_level = state & 0x0fffffff;
+	priv->brightness_level = state & 0x0fffffff;
 
-	return fujitsu_bl->brightness_level;
+	return priv->brightness_level;
 }
 
-static int get_max_brightness(void)
+static int get_max_brightness(struct acpi_device *device)
 {
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	unsigned long long state = 0;
 	acpi_status status = AE_OK;
 
-	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get max lcd level via RBLL\n");
+	acpi_handle_debug(device->handle, "get max lcd level via RBLL\n");
 
-	status = acpi_evaluate_integer(fujitsu_bl->acpi_handle, "RBLL", NULL,
-				       &state);
+	status = acpi_evaluate_integer(device->handle, "RBLL", NULL, &state);
 	if (ACPI_FAILURE(status))
 		return -1;
 
-	fujitsu_bl->max_brightness = state;
+	priv->max_brightness = state;
 
-	return fujitsu_bl->max_brightness;
+	return priv->max_brightness;
 }
 
 /* Backlight device stuff */
 
 static int bl_get_brightness(struct backlight_device *b)
 {
-	return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level();
+	struct acpi_device *device = bl_get_data(b);
+
+	return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(device);
 }
 
 static int bl_update_status(struct backlight_device *b)
 {
+	struct acpi_device *device = bl_get_data(b);
+
 	if (b->props.power == FB_BLANK_POWERDOWN)
-		call_fext_func(FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
+		call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
 	else
-		call_fext_func(FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
+		call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
 
-	return set_lcd_level(b->props.brightness);
+	return set_lcd_level(device, b->props.brightness);
 }
 
 static const struct backlight_ops fujitsu_bl_ops = {
@@ -287,9 +270,11 @@ static const struct backlight_ops fujitsu_bl_ops = {
 static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
 			char *buf)
 {
-	if (!(fujitsu_laptop->flags_supported & FLAG_LID))
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_LID))
 		return sprintf(buf, "unknown\n");
-	if (fujitsu_laptop->flags_state & FLAG_LID)
+	if (priv->flags_state & FLAG_LID)
 		return sprintf(buf, "open\n");
 	else
 		return sprintf(buf, "closed\n");
@@ -298,9 +283,11 @@ static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
-	if (!(fujitsu_laptop->flags_supported & FLAG_DOCK))
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_DOCK))
 		return sprintf(buf, "unknown\n");
-	if (fujitsu_laptop->flags_state & FLAG_DOCK)
+	if (priv->flags_state & FLAG_DOCK)
 		return sprintf(buf, "docked\n");
 	else
 		return sprintf(buf, "undocked\n");
@@ -309,9 +296,11 @@ static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
 			   char *buf)
 {
-	if (!(fujitsu_laptop->flags_supported & FLAG_RFKILL))
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_RFKILL))
 		return sprintf(buf, "unknown\n");
-	if (fujitsu_laptop->flags_state & FLAG_RFKILL)
+	if (priv->flags_state & FLAG_RFKILL)
 		return sprintf(buf, "on\n");
 	else
 		return sprintf(buf, "killed\n");
@@ -348,89 +337,76 @@ static const struct key_entry keymap_backlight[] = {
 
 static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
 {
-	struct fujitsu_bl *fujitsu_bl = acpi_driver_data(device);
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	int ret;
 
-	fujitsu_bl->input = devm_input_allocate_device(&device->dev);
-	if (!fujitsu_bl->input)
+	priv->input = devm_input_allocate_device(&device->dev);
+	if (!priv->input)
 		return -ENOMEM;
 
-	snprintf(fujitsu_bl->phys, sizeof(fujitsu_bl->phys),
-		 "%s/video/input0", acpi_device_hid(device));
+	snprintf(priv->phys, sizeof(priv->phys), "%s/video/input0",
+		 acpi_device_hid(device));
 
-	fujitsu_bl->input->name = acpi_device_name(device);
-	fujitsu_bl->input->phys = fujitsu_bl->phys;
-	fujitsu_bl->input->id.bustype = BUS_HOST;
-	fujitsu_bl->input->id.product = 0x06;
+	priv->input->name = acpi_device_name(device);
+	priv->input->phys = priv->phys;
+	priv->input->id.bustype = BUS_HOST;
+	priv->input->id.product = 0x06;
 
-	ret = sparse_keymap_setup(fujitsu_bl->input, keymap_backlight, NULL);
+	ret = sparse_keymap_setup(priv->input, keymap_backlight, NULL);
 	if (ret)
 		return ret;
 
-	return input_register_device(fujitsu_bl->input);
+	return input_register_device(priv->input);
 }
 
 static int fujitsu_backlight_register(struct acpi_device *device)
 {
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	const struct backlight_properties props = {
-		.brightness = fujitsu_bl->brightness_level,
-		.max_brightness = fujitsu_bl->max_brightness - 1,
+		.brightness = priv->brightness_level,
+		.max_brightness = priv->max_brightness - 1,
 		.type = BACKLIGHT_PLATFORM
 	};
 	struct backlight_device *bd;
 
 	bd = devm_backlight_device_register(&device->dev, "fujitsu-laptop",
-					    &device->dev, NULL,
+					    &device->dev, device,
 					    &fujitsu_bl_ops, &props);
 	if (IS_ERR(bd))
 		return PTR_ERR(bd);
 
-	fujitsu_bl->bl_device = bd;
+	priv->bl_device = bd;
 
 	return 0;
 }
 
 static int acpi_fujitsu_bl_add(struct acpi_device *device)
 {
-	int state = 0;
+	struct fujitsu_bl *priv;
 	int error;
 
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
 		return -ENODEV;
 
-	if (!device)
-		return -EINVAL;
+	priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
 
-	fujitsu_bl->acpi_handle = device->handle;
-	sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_BL_DEVICE_NAME);
-	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
-	device->driver_data = fujitsu_bl;
+	fujitsu_bl = priv;
+	strcpy(acpi_device_name(device), ACPI_FUJITSU_BL_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
+	device->driver_data = priv;
 
 	error = acpi_fujitsu_bl_input_setup(device);
 	if (error)
 		return error;
 
-	error = acpi_bus_update_power(fujitsu_bl->acpi_handle, &state);
-	if (error) {
-		pr_err("Error reading power state\n");
-		return error;
-	}
-
-	pr_info("ACPI: %s [%s] (%s)\n",
-	       acpi_device_name(device), acpi_device_bid(device),
-	       !device->power.state ? "on" : "off");
+	pr_info("ACPI: %s [%s]\n",
+		acpi_device_name(device), acpi_device_bid(device));
 
-	if (acpi_has_method(device->handle, METHOD_NAME__INI)) {
-		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
-		if (ACPI_FAILURE
-		    (acpi_evaluate_object
-		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
-			pr_err("_INI Method failed\n");
-	}
-
-	if (get_max_brightness() <= 0)
-		fujitsu_bl->max_brightness = FUJITSU_LCD_N_LEVELS;
-	get_lcd_level();
+	if (get_max_brightness(device) <= 0)
+		priv->max_brightness = FUJITSU_LCD_N_LEVELS;
+	get_lcd_level(device);
 
 	error = fujitsu_backlight_register(device);
 	if (error)
@@ -443,32 +419,30 @@ static int acpi_fujitsu_bl_add(struct acpi_device *device)
 
 static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 {
-	struct input_dev *input;
+	struct fujitsu_bl *priv = acpi_driver_data(device);
 	int oldb, newb;
 
-	input = fujitsu_bl->input;
-
 	if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
-		vdbg_printk(FUJLAPTOP_DBG_WARN,
-			    "unsupported event [0x%x]\n", event);
-		sparse_keymap_report_event(input, -1, 1, true);
+		acpi_handle_info(device->handle, "unsupported event [0x%x]\n",
+				 event);
+		sparse_keymap_report_event(priv->input, -1, 1, true);
 		return;
 	}
 
-	oldb = fujitsu_bl->brightness_level;
-	get_lcd_level();
-	newb = fujitsu_bl->brightness_level;
+	oldb = priv->brightness_level;
+	get_lcd_level(device);
+	newb = priv->brightness_level;
 
-	vdbg_printk(FUJLAPTOP_DBG_TRACE, "brightness button event [%i -> %i]\n",
-		    oldb, newb);
+	acpi_handle_debug(device->handle,
+			  "brightness button event [%i -> %i]\n", oldb, newb);
 
 	if (oldb == newb)
 		return;
 
 	if (!disable_brightness_adjust)
-		set_lcd_level(newb);
+		set_lcd_level(device, newb);
 
-	sparse_keymap_report_event(input, oldb < newb, 1, true);
+	sparse_keymap_report_event(priv->input, oldb < newb, 1, true);
 }
 
 /* ACPI device for hotkey handling */
@@ -541,42 +515,44 @@ static const struct dmi_system_id fujitsu_laptop_dmi_table[] = {
 
 static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
 {
-	struct fujitsu_laptop *fujitsu_laptop = acpi_driver_data(device);
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 	int ret;
 
-	fujitsu_laptop->input = devm_input_allocate_device(&device->dev);
-	if (!fujitsu_laptop->input)
+	priv->input = devm_input_allocate_device(&device->dev);
+	if (!priv->input)
 		return -ENOMEM;
 
-	snprintf(fujitsu_laptop->phys, sizeof(fujitsu_laptop->phys),
-		 "%s/video/input0", acpi_device_hid(device));
+	snprintf(priv->phys, sizeof(priv->phys), "%s/input0",
+		 acpi_device_hid(device));
 
-	fujitsu_laptop->input->name = acpi_device_name(device);
-	fujitsu_laptop->input->phys = fujitsu_laptop->phys;
-	fujitsu_laptop->input->id.bustype = BUS_HOST;
-	fujitsu_laptop->input->id.product = 0x06;
+	priv->input->name = acpi_device_name(device);
+	priv->input->phys = priv->phys;
+	priv->input->id.bustype = BUS_HOST;
 
 	dmi_check_system(fujitsu_laptop_dmi_table);
-	ret = sparse_keymap_setup(fujitsu_laptop->input, keymap, NULL);
+	ret = sparse_keymap_setup(priv->input, keymap, NULL);
 	if (ret)
 		return ret;
 
-	return input_register_device(fujitsu_laptop->input);
+	return input_register_device(priv->input);
 }
 
-static int fujitsu_laptop_platform_add(void)
+static int fujitsu_laptop_platform_add(struct acpi_device *device)
 {
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 	int ret;
 
-	fujitsu_laptop->pf_device = platform_device_alloc("fujitsu-laptop", -1);
-	if (!fujitsu_laptop->pf_device)
+	priv->pf_device = platform_device_alloc("fujitsu-laptop", -1);
+	if (!priv->pf_device)
 		return -ENOMEM;
 
-	ret = platform_device_add(fujitsu_laptop->pf_device);
+	platform_set_drvdata(priv->pf_device, priv);
+
+	ret = platform_device_add(priv->pf_device);
 	if (ret)
 		goto err_put_platform_device;
 
-	ret = sysfs_create_group(&fujitsu_laptop->pf_device->dev.kobj,
+	ret = sysfs_create_group(&priv->pf_device->dev.kobj,
 				 &fujitsu_pf_attribute_group);
 	if (ret)
 		goto err_del_platform_device;
@@ -584,23 +560,26 @@ static int fujitsu_laptop_platform_add(void)
 	return 0;
 
 err_del_platform_device:
-	platform_device_del(fujitsu_laptop->pf_device);
+	platform_device_del(priv->pf_device);
 err_put_platform_device:
-	platform_device_put(fujitsu_laptop->pf_device);
+	platform_device_put(priv->pf_device);
 
 	return ret;
 }
 
-static void fujitsu_laptop_platform_remove(void)
+static void fujitsu_laptop_platform_remove(struct acpi_device *device)
 {
-	sysfs_remove_group(&fujitsu_laptop->pf_device->dev.kobj,
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+
+	sysfs_remove_group(&priv->pf_device->dev.kobj,
 			   &fujitsu_pf_attribute_group);
-	platform_device_unregister(fujitsu_laptop->pf_device);
+	platform_device_unregister(priv->pf_device);
 }
 
 static int logolamp_set(struct led_classdev *cdev,
 			enum led_brightness brightness)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
 	int ret;
 
@@ -610,132 +589,128 @@ static int logolamp_set(struct led_classdev *cdev,
 	if (brightness < LED_FULL)
 		always = FUNC_LED_OFF;
 
-	ret = call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
+	ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
 	if (ret < 0)
 		return ret;
 
-	return call_fext_func(FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
+	return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
 }
 
 static enum led_brightness logolamp_get(struct led_classdev *cdev)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	int ret;
 
-	ret = call_fext_func(FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
+	ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
 	if (ret == FUNC_LED_ON)
 		return LED_FULL;
 
-	ret = call_fext_func(FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
+	ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
 	if (ret == FUNC_LED_ON)
 		return LED_HALF;
 
 	return LED_OFF;
 }
 
-static struct led_classdev logolamp_led = {
-	.name = "fujitsu::logolamp",
-	.brightness_set_blocking = logolamp_set,
-	.brightness_get = logolamp_get
-};
-
 static int kblamps_set(struct led_classdev *cdev,
 		       enum led_brightness brightness)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
 	if (brightness >= LED_FULL)
-		return call_fext_func(FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+		return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 				      FUNC_LED_ON);
 	else
-		return call_fext_func(FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+		return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
 				      FUNC_LED_OFF);
 }
 
 static enum led_brightness kblamps_get(struct led_classdev *cdev)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	enum led_brightness brightness = LED_OFF;
 
-	if (call_fext_func(FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
+	if (call_fext_func(device,
+			   FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
 		brightness = LED_FULL;
 
 	return brightness;
 }
 
-static struct led_classdev kblamps_led = {
-	.name = "fujitsu::kblamps",
-	.brightness_set_blocking = kblamps_set,
-	.brightness_get = kblamps_get
-};
-
 static int radio_led_set(struct led_classdev *cdev,
 			 enum led_brightness brightness)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
 	if (brightness >= LED_FULL)
-		return call_fext_func(FUNC_FLAGS, 0x5, RADIO_LED_ON,
+		return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
 				      RADIO_LED_ON);
 	else
-		return call_fext_func(FUNC_FLAGS, 0x5, RADIO_LED_ON, 0x0);
+		return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
+				      0x0);
 }
 
 static enum led_brightness radio_led_get(struct led_classdev *cdev)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	enum led_brightness brightness = LED_OFF;
 
-	if (call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
+	if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
 		brightness = LED_FULL;
 
 	return brightness;
 }
 
-static struct led_classdev radio_led = {
-	.name = "fujitsu::radio_led",
-	.brightness_set_blocking = radio_led_set,
-	.brightness_get = radio_led_get,
-	.default_trigger = "rfkill-any"
-};
-
 static int eco_led_set(struct led_classdev *cdev,
 		       enum led_brightness brightness)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	int curr;
 
-	curr = call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0);
+	curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
 	if (brightness >= LED_FULL)
-		return call_fext_func(FUNC_LEDS, 0x1, ECO_LED,
+		return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 				      curr | ECO_LED_ON);
 	else
-		return call_fext_func(FUNC_LEDS, 0x1, ECO_LED,
+		return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
 				      curr & ~ECO_LED_ON);
 }
 
 static enum led_brightness eco_led_get(struct led_classdev *cdev)
 {
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
 	enum led_brightness brightness = LED_OFF;
 
-	if (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
+	if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
 		brightness = LED_FULL;
 
 	return brightness;
 }
 
-static struct led_classdev eco_led = {
-	.name = "fujitsu::eco_led",
-	.brightness_set_blocking = eco_led_set,
-	.brightness_get = eco_led_get
-};
-
 static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 {
+	struct led_classdev *led;
 	int result;
 
-	if (call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
-		result = devm_led_classdev_register(&device->dev,
-						    &logolamp_led);
+	if (call_fext_func(device,
+			   FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		led->name = "fujitsu::logolamp";
+		led->brightness_set_blocking = logolamp_set;
+		led->brightness_get = logolamp_get;
+		result = devm_led_classdev_register(&device->dev, led);
 		if (result)
 			return result;
 	}
 
-	if ((call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
-	    (call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
-		result = devm_led_classdev_register(&device->dev, &kblamps_led);
+	if ((call_fext_func(device,
+			    FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
+	    (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		led->name = "fujitsu::kblamps";
+		led->brightness_set_blocking = kblamps_set;
+		led->brightness_get = kblamps_get;
+		result = devm_led_classdev_register(&device->dev, led);
 		if (result)
 			return result;
 	}
@@ -746,8 +721,13 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 	 * to also have an RF LED.  Therefore use bit 24 as an indicator
 	 * that an RF LED is present.
 	 */
-	if (call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
-		result = devm_led_classdev_register(&device->dev, &radio_led);
+	if (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) & BIT(24)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		led->name = "fujitsu::radio_led";
+		led->brightness_set_blocking = radio_led_set;
+		led->brightness_get = radio_led_get;
+		led->default_trigger = "rfkill-any";
+		result = devm_led_classdev_register(&device->dev, led);
 		if (result)
 			return result;
 	}
@@ -757,9 +737,14 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 	 * bit 14 seems to indicate presence of said led as well.
 	 * Confirm by testing the status.
 	 */
-	if ((call_fext_func(FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
-	    (call_fext_func(FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
-		result = devm_led_classdev_register(&device->dev, &eco_led);
+	if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
+	    (call_fext_func(device,
+			    FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		led->name = "fujitsu::eco_led";
+		led->brightness_set_blocking = eco_led_set;
+		led->brightness_get = eco_led_get;
+		result = devm_led_classdev_register(&device->dev, led);
 		if (result)
 			return result;
 	}
@@ -769,23 +754,25 @@ static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
 
 static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 {
-	int state = 0;
+	struct fujitsu_laptop *priv;
 	int error;
 	int i;
 
-	if (!device)
-		return -EINVAL;
+	priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found.  Driver may not work as intended.");
+	fext = device;
 
-	fujitsu_laptop->acpi_handle = device->handle;
-	sprintf(acpi_device_name(device), "%s",
-		ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
-	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
-	device->driver_data = fujitsu_laptop;
+	strcpy(acpi_device_name(device), ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
+	device->driver_data = priv;
 
 	/* kfifo */
-	spin_lock_init(&fujitsu_laptop->fifo_lock);
-	error = kfifo_alloc(&fujitsu_laptop->fifo, RINGBUFFERSIZE * sizeof(int),
-			GFP_KERNEL);
+	spin_lock_init(&priv->fifo_lock);
+	error = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
+			    GFP_KERNEL);
 	if (error) {
 		pr_err("kfifo_alloc failed\n");
 		goto err_stop;
@@ -795,51 +782,36 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 	if (error)
 		goto err_free_fifo;
 
-	error = acpi_bus_update_power(fujitsu_laptop->acpi_handle, &state);
-	if (error) {
-		pr_err("Error reading power state\n");
-		goto err_free_fifo;
-	}
-
-	pr_info("ACPI: %s [%s] (%s)\n",
-		acpi_device_name(device), acpi_device_bid(device),
-		!device->power.state ? "on" : "off");
-
-	fujitsu_laptop->dev = device;
-
-	if (acpi_has_method(device->handle, METHOD_NAME__INI)) {
-		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
-		if (ACPI_FAILURE
-		    (acpi_evaluate_object
-		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
-			pr_err("_INI Method failed\n");
-	}
+	pr_info("ACPI: %s [%s]\n",
+		acpi_device_name(device), acpi_device_bid(device));
 
 	i = 0;
-	while (call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
+	while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0
 		&& (i++) < MAX_HOTKEY_RINGBUFFER_SIZE)
 		; /* No action, result is discarded */
-	vdbg_printk(FUJLAPTOP_DBG_INFO, "Discarded %i ringbuffer entries\n", i);
+	acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
+			  i);
 
-	fujitsu_laptop->flags_supported =
-		call_fext_func(FUNC_FLAGS, 0x0, 0x0, 0x0);
+	priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
+					       0x0);
 
 	/* Make sure our bitmask of supported functions is cleared if the
 	   RFKILL function block is not implemented, like on the S7020. */
-	if (fujitsu_laptop->flags_supported == UNSUPPORTED_CMD)
-		fujitsu_laptop->flags_supported = 0;
+	if (priv->flags_supported == UNSUPPORTED_CMD)
+		priv->flags_supported = 0;
 
-	if (fujitsu_laptop->flags_supported)
-		fujitsu_laptop->flags_state =
-			call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0);
+	if (priv->flags_supported)
+		priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+						   0x0);
 
 	/* Suspect this is a keymap of the application panel, print it */
-	pr_info("BTNI: [0x%x]\n", call_fext_func(FUNC_BUTTONS, 0x0, 0x0, 0x0));
+	acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
+			 call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
 
 	/* Sync backlight power status */
-	if (fujitsu_bl->bl_device &&
+	if (fujitsu_bl && fujitsu_bl->bl_device &&
 	    acpi_video_get_backlight_type() == acpi_backlight_vendor) {
-		if (call_fext_func(FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
+		if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
 			fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 		else
 			fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
@@ -849,103 +821,100 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 	if (error)
 		goto err_free_fifo;
 
-	error = fujitsu_laptop_platform_add();
+	error = fujitsu_laptop_platform_add(device);
 	if (error)
 		goto err_free_fifo;
 
 	return 0;
 
 err_free_fifo:
-	kfifo_free(&fujitsu_laptop->fifo);
+	kfifo_free(&priv->fifo);
 err_stop:
 	return error;
 }
 
 static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
 {
-	struct fujitsu_laptop *fujitsu_laptop = acpi_driver_data(device);
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 
-	fujitsu_laptop_platform_remove();
+	fujitsu_laptop_platform_remove(device);
 
-	kfifo_free(&fujitsu_laptop->fifo);
+	kfifo_free(&priv->fifo);
 
 	return 0;
 }
 
-static void acpi_fujitsu_laptop_press(int scancode)
+static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
 {
-	struct input_dev *input = fujitsu_laptop->input;
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 	int status;
 
-	status = kfifo_in_locked(&fujitsu_laptop->fifo,
-				 (unsigned char *)&scancode, sizeof(scancode),
-				 &fujitsu_laptop->fifo_lock);
+	status = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
+				 sizeof(scancode), &priv->fifo_lock);
 	if (status != sizeof(scancode)) {
-		vdbg_printk(FUJLAPTOP_DBG_WARN,
-			    "Could not push scancode [0x%x]\n", scancode);
+		dev_info(&priv->input->dev, "Could not push scancode [0x%x]\n",
+			 scancode);
 		return;
 	}
-	sparse_keymap_report_event(input, scancode, 1, false);
-	vdbg_printk(FUJLAPTOP_DBG_TRACE,
-		    "Push scancode into ringbuffer [0x%x]\n", scancode);
+	sparse_keymap_report_event(priv->input, scancode, 1, false);
+	dev_dbg(&priv->input->dev, "Push scancode into ringbuffer [0x%x]\n",
+		scancode);
 }
 
-static void acpi_fujitsu_laptop_release(void)
+static void acpi_fujitsu_laptop_release(struct acpi_device *device)
 {
-	struct input_dev *input = fujitsu_laptop->input;
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 	int scancode, status;
 
 	while (true) {
-		status = kfifo_out_locked(&fujitsu_laptop->fifo,
+		status = kfifo_out_locked(&priv->fifo,
 					  (unsigned char *)&scancode,
-					  sizeof(scancode),
-					  &fujitsu_laptop->fifo_lock);
+					  sizeof(scancode), &priv->fifo_lock);
 		if (status != sizeof(scancode))
 			return;
-		sparse_keymap_report_event(input, scancode, 0, false);
-		vdbg_printk(FUJLAPTOP_DBG_TRACE,
-			    "Pop scancode from ringbuffer [0x%x]\n", scancode);
+		sparse_keymap_report_event(priv->input, scancode, 0, false);
+		dev_dbg(&priv->input->dev,
+			"Pop scancode from ringbuffer [0x%x]\n", scancode);
 	}
 }
 
 static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
 {
-	struct input_dev *input;
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
 	int scancode, i = 0;
 	unsigned int irb;
 
-	input = fujitsu_laptop->input;
-
 	if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
-		vdbg_printk(FUJLAPTOP_DBG_WARN,
-			    "Unsupported event [0x%x]\n", event);
-		sparse_keymap_report_event(input, -1, 1, true);
+		acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
+				 event);
+		sparse_keymap_report_event(priv->input, -1, 1, true);
 		return;
 	}
 
-	if (fujitsu_laptop->flags_supported)
-		fujitsu_laptop->flags_state =
-			call_fext_func(FUNC_FLAGS, 0x4, 0x0, 0x0);
+	if (priv->flags_supported)
+		priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+						   0x0);
 
-	while ((irb = call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
+	while ((irb = call_fext_func(device,
+				     FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
 	       i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
 		scancode = irb & 0x4ff;
-		if (sparse_keymap_entry_from_scancode(input, scancode))
-			acpi_fujitsu_laptop_press(scancode);
+		if (sparse_keymap_entry_from_scancode(priv->input, scancode))
+			acpi_fujitsu_laptop_press(device, scancode);
 		else if (scancode == 0)
-			acpi_fujitsu_laptop_release();
+			acpi_fujitsu_laptop_release(device);
 		else
-			vdbg_printk(FUJLAPTOP_DBG_WARN,
-				    "Unknown GIRB result [%x]\n", irb);
+			acpi_handle_info(device->handle,
+					 "Unknown GIRB result [%x]\n", irb);
 	}
 
 	/* On some models (first seen on the Skylake-based Lifebook
 	 * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
 	 * handled in software; its state is queried using FUNC_FLAGS
 	 */
-	if ((fujitsu_laptop->flags_supported & BIT(26)) &&
-	    (call_fext_func(FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
-		sparse_keymap_report_event(input, BIT(26), 1, true);
+	if ((priv->flags_supported & BIT(26)) &&
+	    (call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0) & BIT(26)))
+		sparse_keymap_report_event(priv->input, BIT(26), 1, true);
 }
 
 /* Initialization */
@@ -992,16 +961,9 @@ static int __init fujitsu_init(void)
 {
 	int ret;
 
-	if (acpi_disabled)
-		return -ENODEV;
-
-	fujitsu_bl = kzalloc(sizeof(struct fujitsu_bl), GFP_KERNEL);
-	if (!fujitsu_bl)
-		return -ENOMEM;
-
 	ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
 	if (ret)
-		goto err_free_fujitsu_bl;
+		return ret;
 
 	/* Register platform stuff */
 
@@ -1011,28 +973,18 @@ static int __init fujitsu_init(void)
 
 	/* Register laptop driver */
 
-	fujitsu_laptop = kzalloc(sizeof(struct fujitsu_laptop), GFP_KERNEL);
-	if (!fujitsu_laptop) {
-		ret = -ENOMEM;
-		goto err_unregister_platform_driver;
-	}
-
 	ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
 	if (ret)
-		goto err_free_fujitsu_laptop;
+		goto err_unregister_platform_driver;
 
 	pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
 
 	return 0;
 
-err_free_fujitsu_laptop:
-	kfree(fujitsu_laptop);
 err_unregister_platform_driver:
 	platform_driver_unregister(&fujitsu_pf_driver);
 err_unregister_acpi:
 	acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
-err_free_fujitsu_bl:
-	kfree(fujitsu_bl);
 
 	return ret;
 }
@@ -1041,14 +993,10 @@ static void __exit fujitsu_cleanup(void)
 {
 	acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
 
-	kfree(fujitsu_laptop);
-
 	platform_driver_unregister(&fujitsu_pf_driver);
 
 	acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
 
-	kfree(fujitsu_bl);
-
 	pr_info("driver unloaded\n");
 }
 
@@ -1059,10 +1007,6 @@ module_param(use_alt_lcd_levels, int, 0644);
 MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
 module_param(disable_brightness_adjust, bool, 0644);
 MODULE_PARM_DESC(disable_brightness_adjust, "Disable LCD brightness adjustment");
-#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
-module_param_named(debug, dbg_level, uint, 0644);
-MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
-#endif
 
 MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
 MODULE_DESCRIPTION("Fujitsu laptop extras support");

drivers/platform/x86/ideapad-laptop.c

@@ -423,9 +423,43 @@ static ssize_t store_ideapad_fan(struct device *dev,
 
 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
 
+static ssize_t touchpad_show(struct device *dev,
+			     struct device_attribute *attr,
+			     char *buf)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	unsigned long result;
+
+	if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
+		return sprintf(buf, "-1\n");
+	return sprintf(buf, "%lu\n", result);
+}
+
+/* Switch to RO for now: It might be revisited in the future */
+static ssize_t __maybe_unused touchpad_store(struct device *dev,
+					     struct device_attribute *attr,
+					     const char *buf, size_t count)
+{
+	struct ideapad_private *priv = dev_get_drvdata(dev);
+	bool state;
+	int ret;
+
+	ret = kstrtobool(buf, &state);
+	if (ret)
+		return ret;
+
+	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
+	if (ret < 0)
+		return -EIO;
+	return count;
+}
+
+static DEVICE_ATTR_RO(touchpad);
+
 static struct attribute *ideapad_attributes[] = {
 	&dev_attr_camera_power.attr,
 	&dev_attr_fan_mode.attr,
+	&dev_attr_touchpad.attr,
 	NULL
 };
 
@@ -478,7 +512,7 @@ static int ideapad_rfk_set(void *data, bool blocked)
 	return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
 }
 
-static struct rfkill_ops ideapad_rfk_ops = {
+static const struct rfkill_ops ideapad_rfk_ops = {
 	.set_block = ideapad_rfk_set,
 };
 
@@ -810,7 +844,6 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 			case 8:
 			case 7:
 			case 6:
-			case 1:
 				ideapad_input_report(priv, vpc_bit);
 				break;
 			case 5:
@@ -828,6 +861,13 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
 			case 0:
 				ideapad_check_special_buttons(priv);
 				break;
+			case 1:
+				/* Some IdeaPads report event 1 every ~20
+				 * seconds while on battery power; some
+				 * report this when changing to/from tablet
+				 * mode. Squelch this event.
+				 */
+				break;
 			default:
 				pr_info("Unknown event: %lu\n", vpc_bit);
 			}
@@ -910,6 +950,20 @@ static const struct dmi_system_id no_hw_rfkill_list[] = {
 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
 		},
 	},
+	{
+		.ident = "Lenovo Legion Y520-15IKBN",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKBN"),
+		},
+	},
+	{
+		.ident = "Lenovo Legion Y720-15IKBN",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBN"),
+		},
+	},
 	{
 		.ident = "Lenovo Yoga 2 11 / 13 / Pro",
 		.matches = {

drivers/platform/x86/intel_cht_int33fe.c

@@ -34,6 +34,13 @@ struct cht_int33fe_data {
 	struct i2c_client *pi3usb30532;
 };
 
+static const char * const max17047_suppliers[] = { "bq24190-charger" };
+
+static const struct property_entry max17047_props[] = {
+	PROPERTY_ENTRY_STRING_ARRAY("supplied-from", max17047_suppliers),
+	{ }
+};
+
 static int cht_int33fe_probe(struct i2c_client *client)
 {
 	struct device *dev = &client->dev;
@@ -70,6 +77,7 @@ static int cht_int33fe_probe(struct i2c_client *client)
 
 	memset(&board_info, 0, sizeof(board_info));
 	strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
+	board_info.properties = max17047_props;
 
 	data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
 	if (!data->max17047)

drivers/platform/x86/intel_menlow.c

@@ -142,7 +142,7 @@ static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
 	return 0;
 }
 
-static struct thermal_cooling_device_ops memory_cooling_ops = {
+static const struct thermal_cooling_device_ops memory_cooling_ops = {
 	.get_max_state = memory_get_max_bandwidth,
 	.get_cur_state = memory_get_cur_bandwidth,
 	.set_cur_state = memory_set_cur_bandwidth,

drivers/platform/x86/intel_pmc_ipc.c

@@ -186,7 +186,7 @@ static inline void ipc_data_writel(u32 data, u32 offset)
 	writel(data, ipcdev.ipc_base + IPC_WRITE_BUFFER + offset);
 }
 
-static inline u8 ipc_data_readb(u32 offset)
+static inline u8 __maybe_unused ipc_data_readb(u32 offset)
 {
 	return readb(ipcdev.ipc_base + IPC_READ_BUFFER + offset);
 }

drivers/platform/x86/msi-laptop.c

@@ -563,11 +563,11 @@ static struct attribute *msipf_old_attributes[] = {
 	NULL
 };
 
-static struct attribute_group msipf_attribute_group = {
+static const struct attribute_group msipf_attribute_group = {
 	.attrs = msipf_attributes
 };
 
-static struct attribute_group msipf_old_attribute_group = {
+static const struct attribute_group msipf_old_attribute_group = {
 	.attrs = msipf_old_attributes
 };
 

drivers/platform/x86/panasonic-laptop.c

@@ -228,10 +228,6 @@ struct pcc_acpi {
 	struct backlight_device	*backlight;
 };
 
-struct pcc_keyinput {
-	struct acpi_hotkey      *hotkey;
-};
-
 /* method access functions */
 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
 {

drivers/platform/x86/peaq-wmi.c

+/*
+ * PEAQ 2-in-1 WMI hotkey driver
+ * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/acpi.h>
+#include <linux/input-polldev.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#define PEAQ_DOLBY_BUTTON_GUID		"ABBC0F6F-8EA1-11D1-00A0-C90629100000"
+#define PEAQ_DOLBY_BUTTON_METHOD_ID	5
+#define PEAQ_POLL_INTERVAL_MS		250
+#define PEAQ_POLL_IGNORE_MS		500
+#define PEAQ_POLL_MAX_MS		1000
+
+MODULE_ALIAS("wmi:"PEAQ_DOLBY_BUTTON_GUID);
+
+static unsigned int peaq_ignore_events_counter;
+static struct input_polled_dev *peaq_poll_dev;
+
+/*
+ * The Dolby button (yes really a Dolby button) causes an ACPI variable to get
+ * set on both press and release. The WMI method checks and clears that flag.
+ * So for a press + release we will get back One from the WMI method either once
+ * (if polling after the release) or twice (polling between press and release).
+ * We ignore events for 0.5s after the first event to avoid reporting 2 presses.
+ */
+static void peaq_wmi_poll(struct input_polled_dev *dev)
+{
+	union acpi_object obj;
+	acpi_status status;
+	u32 dummy = 0;
+
+	struct acpi_buffer input = { sizeof(dummy), &dummy };
+	struct acpi_buffer output = { sizeof(obj), &obj };
+
+	status = wmi_evaluate_method(PEAQ_DOLBY_BUTTON_GUID, 1,
+				     PEAQ_DOLBY_BUTTON_METHOD_ID,
+				     &input, &output);
+	if (ACPI_FAILURE(status))
+		return;
+
+	if (obj.type != ACPI_TYPE_INTEGER) {
+		dev_err(&peaq_poll_dev->input->dev,
+			"Error WMBC did not return an integer\n");
+		return;
+	}
+
+	if (peaq_ignore_events_counter && --peaq_ignore_events_counter > 0)
+		return;
+
+	if (obj.integer.value) {
+		input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 1);
+		input_sync(peaq_poll_dev->input);
+		input_event(peaq_poll_dev->input, EV_KEY, KEY_SOUND, 0);
+		input_sync(peaq_poll_dev->input);
+		peaq_ignore_events_counter = max(1u,
+			PEAQ_POLL_IGNORE_MS / peaq_poll_dev->poll_interval);
+	}
+}
+
+static int __init peaq_wmi_init(void)
+{
+	if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID))
+		return -ENODEV;
+
+	peaq_poll_dev = input_allocate_polled_device();
+	if (!peaq_poll_dev)
+		return -ENOMEM;
+
+	peaq_poll_dev->poll = peaq_wmi_poll;
+	peaq_poll_dev->poll_interval = PEAQ_POLL_INTERVAL_MS;
+	peaq_poll_dev->poll_interval_max = PEAQ_POLL_MAX_MS;
+	peaq_poll_dev->input->name = "PEAQ WMI hotkeys";
+	peaq_poll_dev->input->phys = "wmi/input0";
+	peaq_poll_dev->input->id.bustype = BUS_HOST;
+	input_set_capability(peaq_poll_dev->input, EV_KEY, KEY_SOUND);
+
+	return input_register_polled_device(peaq_poll_dev);
+}
+
+static void __exit peaq_wmi_exit(void)
+{
+	if (!wmi_has_guid(PEAQ_DOLBY_BUTTON_GUID))
+		return;
+
+	input_unregister_polled_device(peaq_poll_dev);
+}
+
+module_init(peaq_wmi_init);
+module_exit(peaq_wmi_exit);
+
+MODULE_DESCRIPTION("PEAQ 2-in-1 WMI hotkey driver");
+MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
+MODULE_LICENSE("GPL");

drivers/platform/x86/samsung-laptop.c

@@ -591,7 +591,7 @@ static int seclinux_rfkill_set(void *data, bool blocked)
 				 !blocked);
 }
 
-static struct rfkill_ops seclinux_rfkill_ops = {
+static const struct rfkill_ops seclinux_rfkill_ops = {
 	.set_block = seclinux_rfkill_set,
 };
 
@@ -651,7 +651,7 @@ static void swsmi_rfkill_query(struct rfkill *rfkill, void *priv)
 	rfkill_set_sw_state(rfkill, !ret);
 }
 
-static struct rfkill_ops swsmi_rfkill_ops = {
+static const struct rfkill_ops swsmi_rfkill_ops = {
 	.set_block = swsmi_rfkill_set,
 	.query = swsmi_rfkill_query,
 };
@@ -1446,9 +1446,9 @@ static int __init samsung_sabi_init(struct samsung_laptop *samsung)
 	const struct sabi_config *config = NULL;
 	const struct sabi_commands *commands;
 	unsigned int ifaceP;
+	int loca = 0xffff;
 	int ret = 0;
 	int i;
-	int loca;
 
 	samsung->f0000_segment = ioremap_nocache(0xf0000, 0xffff);
 	if (!samsung->f0000_segment) {

drivers/platform/x86/silead_dmi.c

@@ -80,6 +80,48 @@ static const struct silead_ts_dmi_data surftab_wintron70_st70416_6_data = {
 	.properties	= surftab_wintron70_st70416_6_props,
 };
 
+static const struct property_entry gp_electronic_t701_props[] = {
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
+	PROPERTY_ENTRY_STRING("firmware-name",
+			      "gsl1680-gp-electronic-t701.fw"),
+	{ }
+};
+
+static const struct silead_ts_dmi_data gp_electronic_t701_data = {
+	.acpi_name	= "MSSL1680:00",
+	.properties	= gp_electronic_t701_props,
+};
+
+static const struct property_entry pipo_w2s_props[] = {
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 880),
+	PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
+	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+	PROPERTY_ENTRY_STRING("firmware-name",
+			      "gsl1680-pipo-w2s.fw"),
+	{ }
+};
+
+static const struct silead_ts_dmi_data pipo_w2s_data = {
+	.acpi_name	= "MSSL1680:00",
+	.properties	= pipo_w2s_props,
+};
+
+static const struct property_entry pov_mobii_wintab_p800w_props[] = {
+	PROPERTY_ENTRY_U32("touchscreen-size-x", 1800),
+	PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
+	PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+	PROPERTY_ENTRY_STRING("firmware-name",
+			      "gsl3692-pov-mobii-wintab-p800w.fw"),
+	{ }
+};
+
+static const struct silead_ts_dmi_data pov_mobii_wintab_p800w_data = {
+	.acpi_name	= "MSSL1680:00",
+	.properties	= pov_mobii_wintab_p800w_props,
+};
+
 static const struct dmi_system_id silead_ts_dmi_table[] = {
 	{
 		/* CUBE iwork8 Air */
@@ -117,6 +159,34 @@ static const struct dmi_system_id silead_ts_dmi_table[] = {
 			DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA04"),
 		},
 	},
+	{
+		/* GP-electronic T701 */
+		.driver_data = (void *)&gp_electronic_t701_data,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "T701"),
+			DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),
+		},
+	},
+	{
+		/* Pipo W2S */
+		.driver_data = (void *)&pipo_w2s_data,
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "PIPO"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "W2S"),
+		},
+	},
+	{
+		/* Point of View mobii wintab p800w */
+		.driver_data = (void *)&pov_mobii_wintab_p800w_data,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
+			DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
+			DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
+			/* Above matches are too generic, add bios-date match */
+			DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
+		},
+	},
 	{ },
 };
 

drivers/platform/x86/sony-laptop.c

@@ -222,7 +222,7 @@ struct sony_laptop_keypress {
 /* Correspondance table between sonypi events
  * and input layer indexes in the keymap
  */
-static int sony_laptop_input_index[] = {
+static const int sony_laptop_input_index[] = {
 	-1,	/*  0 no event */
 	-1,	/*  1 SONYPI_EVENT_JOGDIAL_DOWN */
 	-1,	/*  2 SONYPI_EVENT_JOGDIAL_UP */
@@ -4032,7 +4032,7 @@ static struct attribute *spic_attributes[] = {
 	NULL
 };
 
-static struct attribute_group spic_attribute_group = {
+static const struct attribute_group spic_attribute_group = {
 	.attrs = spic_attributes
 };
 

drivers/platform/x86/thinkpad_acpi.c

@@ -590,8 +590,8 @@ static int acpi_evalf(acpi_handle handle,
 			break;
 			/* add more types as needed */
 		default:
-			pr_err("acpi_evalf() called "
-			       "with invalid format character '%c'\n", c);
+			pr_err("acpi_evalf() called with invalid format character '%c'\n",
+			       c);
 			va_end(ap);
 			return 0;
 		}
@@ -619,8 +619,8 @@ static int acpi_evalf(acpi_handle handle,
 		break;
 		/* add more types as needed */
 	default:
-		pr_err("acpi_evalf() called "
-		       "with invalid format character '%c'\n", res_type);
+		pr_err("acpi_evalf() called with invalid format character '%c'\n",
+		       res_type);
 		return 0;
 	}
 
@@ -790,8 +790,8 @@ static int __init setup_acpi_notify(struct ibm_struct *ibm)
 			ibm->acpi->type, dispatch_acpi_notify, ibm);
 	if (ACPI_FAILURE(status)) {
 		if (status == AE_ALREADY_EXISTS) {
-			pr_notice("another device driver is already "
-				  "handling %s events\n", ibm->name);
+			pr_notice("another device driver is already handling %s events\n",
+				  ibm->name);
 		} else {
 			pr_err("acpi_install_notify_handler(%s) failed: %s\n",
 			       ibm->name, acpi_format_exception(status));
@@ -1095,8 +1095,7 @@ static void printk_deprecated_attribute(const char * const what,
 					const char * const details)
 {
 	tpacpi_log_usertask("deprecated sysfs attribute");
-	pr_warn("WARNING: sysfs attribute %s is deprecated and "
-		"will be removed. %s\n",
+	pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n",
 		what, details);
 }
 
@@ -1796,8 +1795,7 @@ static void __init tpacpi_check_outdated_fw(void)
 		 * best if the user upgrades the firmware anyway.
 		 */
 		pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n");
-		pr_warn("WARNING: This firmware may be missing critical bug "
-			"fixes and/or important features\n");
+		pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n");
 	}
 }
 
@@ -2166,8 +2164,7 @@ static int hotkey_mask_set(u32 mask)
 	 * a given event.
 	 */
 	if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) {
-		pr_notice("asked for hotkey mask 0x%08x, but "
-			  "firmware forced it to 0x%08x\n",
+		pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n",
 			  fwmask, hotkey_acpi_mask);
 	}
 
@@ -2192,11 +2189,9 @@ static int hotkey_user_mask_set(const u32 mask)
 	    (mask == 0xffff || mask == 0xffffff ||
 	     mask == 0xffffffff)) {
 		tp_warned.hotkey_mask_ff = 1;
-		pr_notice("setting the hotkey mask to 0x%08x is likely "
-			  "not the best way to go about it\n", mask);
-		pr_notice("please consider using the driver defaults, "
-			  "and refer to up-to-date thinkpad-acpi "
-			  "documentation\n");
+		pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n",
+			  mask);
+		pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n");
 	}
 
 	/* Try to enable what the user asked for, plus whatever we need.
@@ -2571,17 +2566,14 @@ static void hotkey_poll_setup(const bool may_warn)
 					NULL, TPACPI_NVRAM_KTHREAD_NAME);
 			if (IS_ERR(tpacpi_hotkey_task)) {
 				tpacpi_hotkey_task = NULL;
-				pr_err("could not create kernel thread "
-				       "for hotkey polling\n");
+				pr_err("could not create kernel thread for hotkey polling\n");
 			}
 		}
 	} else {
 		hotkey_poll_stop_sync();
 		if (may_warn && (poll_driver_mask || poll_user_mask) &&
 		    hotkey_poll_freq == 0) {
-			pr_notice("hot keys 0x%08x and/or events 0x%08x "
-				  "require polling, which is currently "
-				  "disabled\n",
+			pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n",
 				  poll_user_mask, poll_driver_mask);
 		}
 	}
@@ -2808,12 +2800,10 @@ static ssize_t hotkey_source_mask_store(struct device *dev,
 	mutex_unlock(&hotkey_mutex);
 
 	if (rc < 0)
-		pr_err("hotkey_source_mask: "
-		       "failed to update the firmware event mask!\n");
+		pr_err("hotkey_source_mask: failed to update the firmware event mask!\n");
 
 	if (r_ev)
-		pr_notice("hotkey_source_mask: "
-			  "some important events were disabled: 0x%04x\n",
+		pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n",
 			  r_ev);
 
 	tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
@@ -3074,8 +3064,7 @@ static void hotkey_exit(void)
 	if (((tp_features.hotkey_mask &&
 	      hotkey_mask_set(hotkey_orig_mask)) |
 	     hotkey_status_set(false)) != 0)
-		pr_err("failed to restore hot key mask "
-		       "to BIOS defaults\n");
+		pr_err("failed to restore hot key mask to BIOS defaults\n");
 }
 
 static void __init hotkey_unmap(const unsigned int scancode)
@@ -3587,11 +3576,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
 	 * userspace. tpacpi_detect_brightness_capabilities() must have
 	 * been called before this point  */
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
-		pr_info("This ThinkPad has standard ACPI backlight "
-			"brightness control, supported by the ACPI "
-			"video driver\n");
-		pr_notice("Disabling thinkpad-acpi brightness events "
-			  "by default...\n");
+		pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n");
+		pr_notice("Disabling thinkpad-acpi brightness events by default...\n");
 
 		/* Disable brightness up/down on Lenovo thinkpads when
 		 * ACPI is handling them, otherwise it is plain impossible
@@ -3760,7 +3746,7 @@ static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode)
 		    TP_ACPI_HOTKEYSCAN_EXTENDED_START -
 		    TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) {
 			pr_info("Unhandled adaptive keyboard key: 0x%x\n",
-					scancode);
+				scancode);
 			return false;
 		}
 		keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY +
@@ -3957,14 +3943,12 @@ static bool hotkey_notify_6xxx(const u32 hkey,
 		/* recommended action: immediate sleep/hibernate */
 		break;
 	case TP_HKEY_EV_ALARM_SENSOR_HOT:
-		pr_crit("THERMAL ALARM: "
-			"a sensor reports something is too hot!\n");
+		pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n");
 		/* recommended action: warn user through gui, that */
 		/* some internal component is too hot */
 		break;
 	case TP_HKEY_EV_ALARM_SENSOR_XHOT:
-		pr_alert("THERMAL EMERGENCY: "
-			 "a sensor reports something is extremely hot!\n");
+		pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n");
 		/* recommended action: immediate sleep/hibernate */
 		break;
 	case TP_HKEY_EV_AC_CHANGED:
@@ -4089,8 +4073,8 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 		}
 		if (!known_ev) {
 			pr_notice("unhandled HKEY event 0x%04x\n", hkey);
-			pr_notice("please report the conditions when this "
-				  "event happened to %s\n", TPACPI_MAIL);
+			pr_notice("please report the conditions when this event happened to %s\n",
+				  TPACPI_MAIL);
 		}
 
 		/* netlink events */
@@ -4124,8 +4108,7 @@ static void hotkey_resume(void)
 
 	if (hotkey_status_set(true) < 0 ||
 	    hotkey_mask_set(hotkey_acpi_mask) < 0)
-		pr_err("error while attempting to reset the event "
-		       "firmware interface\n");
+		pr_err("error while attempting to reset the event firmware interface\n");
 
 	tpacpi_send_radiosw_update();
 	hotkey_tablet_mode_notify_change();
@@ -4177,12 +4160,8 @@ static void hotkey_enabledisable_warn(bool enable)
 {
 	tpacpi_log_usertask("procfs hotkey enable/disable");
 	if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
-		  pr_fmt("hotkey enable/disable functionality has been "
-			 "removed from the driver.  "
-			 "Hotkeys are always enabled.\n")))
-		pr_err("Please remove the hotkey=enable module "
-		       "parameter, it is deprecated.  "
-		       "Hotkeys are always enabled.\n");
+		  pr_fmt("hotkey enable/disable functionality has been removed from the driver.  Hotkeys are always enabled.\n")))
+		pr_err("Please remove the hotkey=enable module parameter, it is deprecated.  Hotkeys are always enabled.\n");
 }
 
 static int hotkey_write(char *buf)
@@ -4840,8 +4819,7 @@ static void video_exit(void)
 	dbg_printk(TPACPI_DBG_EXIT,
 		   "restoring original video autoswitch mode\n");
 	if (video_autosw_set(video_orig_autosw))
-		pr_err("error while trying to restore original "
-			"video autoswitch mode\n");
+		pr_err("error while trying to restore original video autoswitch mode\n");
 }
 
 static int video_outputsw_get(void)
@@ -5931,8 +5909,7 @@ static int __init led_init(struct ibm_init_struct *iibm)
 	}
 
 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
-	pr_notice("warning: userspace override of important "
-		  "firmware LEDs is enabled\n");
+	pr_notice("warning: userspace override of important firmware LEDs is enabled\n");
 #endif
 	return 0;
 }
@@ -5961,8 +5938,7 @@ static int led_read(struct seq_file *m)
 		}
 	}
 
-	seq_printf(m, "commands:\t"
-		       "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
+	seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n");
 
 	return 0;
 }
@@ -6335,13 +6311,10 @@ static int __init thermal_init(struct ibm_init_struct *iibm)
 		if (ta1 == 0) {
 			/* This is sheer paranoia, but we handle it anyway */
 			if (acpi_tmp7) {
-				pr_err("ThinkPad ACPI EC access misbehaving, "
-				       "falling back to ACPI TMPx access "
-				       "mode\n");
+				pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n");
 				thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
 			} else {
-				pr_err("ThinkPad ACPI EC access misbehaving, "
-				       "disabling thermal sensors access\n");
+				pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n");
 				thermal_read_mode = TPACPI_THERMAL_NONE;
 			}
 		} else {
@@ -6820,26 +6793,20 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 
 	if (!brightness_enable) {
 		dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
-			   "brightness support disabled by "
-			   "module parameter\n");
+			   "brightness support disabled by module parameter\n");
 		return 1;
 	}
 
 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor) {
 		if (brightness_enable > 1) {
-			pr_info("Standard ACPI backlight interface "
-				"available, not loading native one\n");
+			pr_info("Standard ACPI backlight interface available, not loading native one\n");
 			return 1;
 		} else if (brightness_enable == 1) {
-			pr_warn("Cannot enable backlight brightness support, "
-				"ACPI is already handling it.  Refer to the "
-				"acpi_backlight kernel parameter.\n");
+			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
 			return 1;
 		}
 	} else if (tp_features.bright_acpimode && brightness_enable > 1) {
-		pr_notice("Standard ACPI backlight interface not "
-			  "available, thinkpad_acpi native "
-			  "brightness control enabled\n");
+		pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n");
 	}
 
 	/*
@@ -6890,10 +6857,10 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 			"brightness is supported\n");
 
 	if (quirks & TPACPI_BRGHT_Q_ASK) {
-		pr_notice("brightness: will use unverified default: "
-			  "brightness_mode=%d\n", brightness_mode);
-		pr_notice("brightness: please report to %s whether it works well "
-			  "or not on your ThinkPad\n", TPACPI_MAIL);
+		pr_notice("brightness: will use unverified default: brightness_mode=%d\n",
+			  brightness_mode);
+		pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n",
+			  TPACPI_MAIL);
 	}
 
 	/* Added by mistake in early 2007.  Probably useless, but it could
@@ -6903,8 +6870,7 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
 	backlight_update_status(ibm_backlight_device);
 
 	vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
-			"brightness: registering brightness hotkeys "
-			"as change notification\n");
+		    "brightness: registering brightness hotkeys as change notification\n");
 	tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
 				| TP_ACPI_HKEY_BRGHTUP_MASK
 				| TP_ACPI_HKEY_BRGHTDWN_MASK);
@@ -7567,8 +7533,8 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 		return -EINVAL;
 
 	if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) {
-		pr_err("UCMS step volume mode not implemented, "
-		       "please contact %s\n", TPACPI_MAIL);
+		pr_err("UCMS step volume mode not implemented, please contact %s\n",
+		       TPACPI_MAIL);
 		return 1;
 	}
 
@@ -7581,8 +7547,7 @@ static int __init volume_init(struct ibm_init_struct *iibm)
 	 */
 	if (!alsa_enable) {
 		vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER,
-			    "ALSA mixer disabled by parameter, "
-			    "not loading volume subdriver...\n");
+			    "ALSA mixer disabled by parameter, not loading volume subdriver...\n");
 		return 1;
 	}
 
@@ -7674,12 +7639,9 @@ static int volume_read(struct seq_file *m)
 		if (volume_control_allowed) {
 			seq_printf(m, "commands:\tunmute, mute\n");
 			if (!tp_features.mixer_no_level_control) {
-				seq_printf(m,
-					       "commands:\tup, down\n");
-				seq_printf(m,
-					       "commands:\tlevel <level>"
-					       " (<level> is 0-%d)\n",
-					       TP_EC_VOLUME_MAX);
+				seq_printf(m, "commands:\tup, down\n");
+				seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n",
+					      TP_EC_VOLUME_MAX);
 			}
 		}
 	}
@@ -7702,10 +7664,8 @@ static int volume_write(char *buf)
 	if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) {
 		if (unlikely(!tp_warned.volume_ctrl_forbidden)) {
 			tp_warned.volume_ctrl_forbidden = 1;
-			pr_notice("Console audio control in monitor mode, "
-				  "changes are not allowed\n");
-			pr_notice("Use the volume_control=1 module parameter "
-				  "to enable volume control\n");
+			pr_notice("Console audio control in monitor mode, changes are not allowed\n");
+			pr_notice("Use the volume_control=1 module parameter to enable volume control\n");
 		}
 		return -EPERM;
 	}
@@ -7987,8 +7947,7 @@ TPACPI_HANDLE(sfan, ec, "SFAN",	/* 570 */
 static void fan_quirk1_setup(void)
 {
 	if (fan_control_initial_status == 0x07) {
-		pr_notice("fan_init: initial fan status is unknown, "
-			  "assuming it is in auto mode\n");
+		pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n");
 		tp_features.fan_ctrl_status_undef = 1;
 	}
 }
@@ -8385,8 +8344,8 @@ static void fan_watchdog_fire(struct work_struct *ignored)
 	pr_notice("fan watchdog: enabling fan\n");
 	rc = fan_set_enable();
 	if (rc < 0) {
-		pr_err("fan watchdog: error %d while enabling fan, "
-		       "will try again later...\n", -rc);
+		pr_err("fan watchdog: error %d while enabling fan, will try again later...\n",
+		       rc);
 		/* reschedule for later */
 		fan_watchdog_reset();
 	}
@@ -8680,8 +8639,7 @@ static int __init fan_init(struct ibm_init_struct *iibm)
 					"secondary fan support enabled\n");
 			}
 		} else {
-			pr_err("ThinkPad ACPI EC access misbehaving, "
-			       "fan status and control unavailable\n");
+			pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n");
 			return 1;
 		}
 	}
@@ -8780,8 +8738,8 @@ static void fan_suspend(void)
 	fan_control_resume_level = 0;
 	rc = fan_get_status_safe(&fan_control_resume_level);
 	if (rc < 0)
-		pr_notice("failed to read fan level for later "
-			  "restore during resume: %d\n", rc);
+		pr_notice("failed to read fan level for later restore during resume: %d\n",
+			  rc);
 
 	/* if it is undefined, don't attempt to restore it.
 	 * KEEP THIS LAST */
@@ -8900,20 +8858,17 @@ static int fan_read(struct seq_file *m)
 			break;
 
 		default:
-			seq_printf(m, " (<level> is 0-7, "
-				       "auto, disengaged, full-speed)\n");
+			seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n");
 			break;
 		}
 	}
 
 	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
 		seq_printf(m, "commands:\tenable, disable\n"
-			       "commands:\twatchdog <timeout> (<timeout> "
-			       "is 0 (off), 1-120 (seconds))\n");
+			       "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n");
 
 	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
-		seq_printf(m, "commands:\tspeed <speed>"
-			       " (<speed> is 0-65535)\n");
+		seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n");
 
 	return 0;
 }
@@ -9439,8 +9394,7 @@ static int __must_check __init get_thinkpad_model_data(
 				tp->ec_release = (ec_fw_string[4] << 8)
 						| ec_fw_string[5];
 			} else {
-				pr_notice("ThinkPad firmware release %s "
-					  "doesn't match the known patterns\n",
+				pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n",
 					  ec_fw_string);
 				pr_notice("please report this to %s\n",
 					  TPACPI_MAIL);
@@ -9635,8 +9589,7 @@ MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
 
 module_param(force_load, bool, 0444);
 MODULE_PARM_DESC(force_load,
-		 "Attempts to load the driver even on a "
-		 "mis-identified ThinkPad when true");
+		 "Attempts to load the driver even on a mis-identified ThinkPad when true");
 
 module_param_named(fan_control, fan_control_allowed, bool, 0444);
 MODULE_PARM_DESC(fan_control,
@@ -9644,8 +9597,7 @@ MODULE_PARM_DESC(fan_control,
 
 module_param_named(brightness_mode, brightness_mode, uint, 0444);
 MODULE_PARM_DESC(brightness_mode,
-		 "Selects brightness control strategy: "
-		 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
+		 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
 
 module_param(brightness_enable, uint, 0444);
 MODULE_PARM_DESC(brightness_enable,
@@ -9654,18 +9606,15 @@ MODULE_PARM_DESC(brightness_enable,
 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT
 module_param_named(volume_mode, volume_mode, uint, 0444);
 MODULE_PARM_DESC(volume_mode,
-		 "Selects volume control strategy: "
-		 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
+		 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM");
 
 module_param_named(volume_capabilities, volume_capabilities, uint, 0444);
 MODULE_PARM_DESC(volume_capabilities,
-		 "Selects the mixer capabilites: "
-		 "0=auto, 1=volume and mute, 2=mute only");
+		 "Selects the mixer capabilites: 0=auto, 1=volume and mute, 2=mute only");
 
 module_param_named(volume_control, volume_control_allowed, bool, 0444);
 MODULE_PARM_DESC(volume_control,
-		 "Enables software override for the console audio "
-		 "control when true");
+		 "Enables software override for the console audio control when true");
 
 module_param_named(software_mute, software_mute_requested, bool, 0444);
 MODULE_PARM_DESC(software_mute,
@@ -9680,10 +9629,10 @@ module_param_named(enable, alsa_enable, bool, 0444);
 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer");
 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */
 
+/* The module parameter can't be read back, that's why 0 is used here */
 #define TPACPI_PARAM(feature) \
 	module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
-	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
-			 "at module load, see documentation")
+	MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation")
 
 TPACPI_PARAM(hotkey);
 TPACPI_PARAM(bluetooth);

drivers/platform/x86/topstar-laptop.c

@@ -162,6 +162,7 @@ static int acpi_topstar_remove(struct acpi_device *device)
 }
 
 static const struct acpi_device_id topstar_device_ids[] = {
+	{ "TPS0001", 0 },
 	{ "TPSACPI01", 0 },
 	{ "", 0 },
 };

drivers/platform/x86/toshiba_acpi.c

@@ -1502,14 +1502,9 @@ static ssize_t video_proc_write(struct file *file, const char __user *buf,
 	int ret;
 	u32 video_out;
 
-	cmd = kmalloc(count + 1, GFP_KERNEL);
-	if (!cmd)
-		return -ENOMEM;
-	if (copy_from_user(cmd, buf, count)) {
-		kfree(cmd);
-		return -EFAULT;
-	}
-	cmd[count] = '\0';
+	cmd = memdup_user_nul(buf, count);
+	if (IS_ERR(cmd))
+		return PTR_ERR(cmd);
 
 	buffer = cmd;
 

drivers/platform/x86/toshiba_haps.c

@@ -132,7 +132,7 @@ static struct attribute *haps_attributes[] = {
 	NULL,
 };
 
-static struct attribute_group haps_attr_group = {
+static const struct attribute_group haps_attr_group = {
 	.attrs = haps_attributes,
 };
 

drivers/platform/x86/wmi-bmof.c

+/*
+ * WMI embedded Binary MOF driver
+ *
+ * Copyright (c) 2015 Andrew Lutomirski
+ * Copyright (C) 2017 VMware, Inc. All Rights Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/sysfs.h>
+#include <linux/types.h>
+#include <linux/wmi.h>
+
+#define WMI_BMOF_GUID "05901221-D566-11D1-B2F0-00A0C9062910"
+
+struct bmof_priv {
+	union acpi_object *bmofdata;
+	struct bin_attribute bmof_bin_attr;
+};
+
+static ssize_t
+read_bmof(struct file *filp, struct kobject *kobj,
+	 struct bin_attribute *attr,
+	 char *buf, loff_t off, size_t count)
+{
+	struct bmof_priv *priv =
+		container_of(attr, struct bmof_priv, bmof_bin_attr);
+
+	if (off < 0)
+		return -EINVAL;
+
+	if (off >= priv->bmofdata->buffer.length)
+		return 0;
+
+	if (count > priv->bmofdata->buffer.length - off)
+		count = priv->bmofdata->buffer.length - off;
+
+	memcpy(buf, priv->bmofdata->buffer.pointer + off, count);
+	return count;
+}
+
+static int wmi_bmof_probe(struct wmi_device *wdev)
+{
+	struct bmof_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(&wdev->dev, sizeof(struct bmof_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	dev_set_drvdata(&wdev->dev, priv);
+
+	priv->bmofdata = wmidev_block_query(wdev, 0);
+	if (!priv->bmofdata) {
+		dev_err(&wdev->dev, "failed to read Binary MOF\n");
+		return -EIO;
+	}
+
+	if (priv->bmofdata->type != ACPI_TYPE_BUFFER) {
+		dev_err(&wdev->dev, "Binary MOF is not a buffer\n");
+		ret = -EIO;
+		goto err_free;
+	}
+
+	sysfs_bin_attr_init(&priv->bmof_bin_attr);
+	priv->bmof_bin_attr.attr.name = "bmof";
+	priv->bmof_bin_attr.attr.mode = 0400;
+	priv->bmof_bin_attr.read = read_bmof;
+	priv->bmof_bin_attr.size = priv->bmofdata->buffer.length;
+
+	ret = sysfs_create_bin_file(&wdev->dev.kobj, &priv->bmof_bin_attr);
+	if (ret)
+		goto err_free;
+
+	return 0;
+
+ err_free:
+	kfree(priv->bmofdata);
+	return ret;
+}
+
+static int wmi_bmof_remove(struct wmi_device *wdev)
+{
+	struct bmof_priv *priv = dev_get_drvdata(&wdev->dev);
+
+	sysfs_remove_bin_file(&wdev->dev.kobj, &priv->bmof_bin_attr);
+	kfree(priv->bmofdata);
+	return 0;
+}
+
+static const struct wmi_device_id wmi_bmof_id_table[] = {
+	{ .guid_string = WMI_BMOF_GUID },
+	{ },
+};
+
+static struct wmi_driver wmi_bmof_driver = {
+	.driver = {
+		.name = "wmi-bmof",
+	},
+	.probe = wmi_bmof_probe,
+	.remove = wmi_bmof_remove,
+	.id_table = wmi_bmof_id_table,
+};
+
+module_wmi_driver(wmi_bmof_driver);
+
+MODULE_ALIAS("wmi:" WMI_BMOF_GUID);
+MODULE_AUTHOR("Andrew Lutomirski <luto@kernel.org>");
+MODULE_DESCRIPTION("WMI embedded Binary MOF driver");
+MODULE_LICENSE("GPL");

drivers/platform/x86/wmi.c

@@ -8,6 +8,10 @@
  *   Copyright (c) 2001-2007 Anton Altaparmakov
  *   Copyright (C) 2001,2002 Jakob Kemi <jakob.kemi@telia.com>
  *
+ *  WMI bus infrastructure by Andrew Lutomirski and Darren Hart:
+ *    Copyright (C) 2015 Andrew Lutomirski
+ *    Copyright (C) 2017 VMware, Inc. All Rights Reserved.
+ *
  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -37,6 +41,8 @@
 #include <linux/acpi.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/wmi.h>
 #include <linux/uuid.h>
 
 ACPI_MODULE_NAME("wmi");
@@ -44,8 +50,6 @@ MODULE_AUTHOR("Carlos Corbacho");
 MODULE_DESCRIPTION("ACPI-WMI Mapping Driver");
 MODULE_LICENSE("GPL");
 
-#define ACPI_WMI_CLASS "wmi"
-
 static LIST_HEAD(wmi_block_list);
 
 struct guid_block {
@@ -62,12 +66,14 @@ struct guid_block {
 };
 
 struct wmi_block {
+	struct wmi_device dev;
 	struct list_head list;
 	struct guid_block gblock;
-	acpi_handle handle;
+	struct acpi_device *acpi_device;
 	wmi_notify_handler handler;
 	void *handler_data;
-	struct device dev;
+
+	bool read_takes_no_args;
 };
 
 
@@ -90,9 +96,8 @@ module_param(debug_dump_wdg, bool, 0444);
 MODULE_PARM_DESC(debug_dump_wdg,
 		 "Dump available WMI interfaces [0/1]");
 
-static int acpi_wmi_remove(struct acpi_device *device);
-static int acpi_wmi_add(struct acpi_device *device);
-static void acpi_wmi_notify(struct acpi_device *device, u32 event);
+static int acpi_wmi_remove(struct platform_device *device);
+static int acpi_wmi_probe(struct platform_device *device);
 
 static const struct acpi_device_id wmi_device_ids[] = {
 	{"PNP0C14", 0},
@@ -101,15 +106,13 @@ static const struct acpi_device_id wmi_device_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, wmi_device_ids);
 
-static struct acpi_driver acpi_wmi_driver = {
-	.name = "wmi",
-	.class = ACPI_WMI_CLASS,
-	.ids = wmi_device_ids,
-	.ops = {
-		.add = acpi_wmi_add,
-		.remove = acpi_wmi_remove,
-		.notify = acpi_wmi_notify,
+static struct platform_driver acpi_wmi_driver = {
+	.driver = {
+		.name = "acpi-wmi",
+		.acpi_match_table = wmi_device_ids,
 	},
+	.probe = acpi_wmi_probe,
+	.remove = acpi_wmi_remove,
 };
 
 /*
@@ -139,6 +142,30 @@ static bool find_guid(const char *guid_string, struct wmi_block **out)
 	return false;
 }
 
+static int get_subobj_info(acpi_handle handle, const char *pathname,
+			   struct acpi_device_info **info)
+{
+	struct acpi_device_info *dummy_info, **info_ptr;
+	acpi_handle subobj_handle;
+	acpi_status status;
+
+	status = acpi_get_handle(handle, (char *)pathname, &subobj_handle);
+	if (status == AE_NOT_FOUND)
+		return -ENOENT;
+	else if (ACPI_FAILURE(status))
+		return -EIO;
+
+	info_ptr = info ? info : &dummy_info;
+	status = acpi_get_object_info(subobj_handle, info_ptr);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	if (!info)
+		kfree(dummy_info);
+
+	return 0;
+}
+
 static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
 {
 	struct guid_block *block = NULL;
@@ -147,7 +174,7 @@ static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
 	acpi_handle handle;
 
 	block = &wblock->gblock;
-	handle = wblock->handle;
+	handle = wblock->acpi_device->handle;
 
 	snprintf(method, 5, "WE%02X", block->notify_id);
 	status = acpi_execute_simple_method(handle, method, enable);
@@ -186,7 +213,7 @@ u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
 		return AE_ERROR;
 
 	block = &wblock->gblock;
-	handle = wblock->handle;
+	handle = wblock->acpi_device->handle;
 
 	if (!(block->flags & ACPI_WMI_METHOD))
 		return AE_BAD_DATA;
@@ -221,19 +248,10 @@ u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
 }
 EXPORT_SYMBOL_GPL(wmi_evaluate_method);
 
-/**
- * wmi_query_block - Return contents of a WMI block
- * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
- * @instance: Instance index
- * &out: Empty buffer to return the contents of the data block to
- *
- * Return the contents of an ACPI-WMI data block to a buffer
- */
-acpi_status wmi_query_block(const char *guid_string, u8 instance,
-struct acpi_buffer *out)
+static acpi_status __query_block(struct wmi_block *wblock, u8 instance,
+				 struct acpi_buffer *out)
 {
 	struct guid_block *block = NULL;
-	struct wmi_block *wblock = NULL;
 	acpi_handle handle;
 	acpi_status status, wc_status = AE_ERROR;
 	struct acpi_object_list input;
@@ -241,14 +259,11 @@ struct acpi_buffer *out)
 	char method[5];
 	char wc_method[5] = "WC";
 
-	if (!guid_string || !out)
+	if (!out)
 		return AE_BAD_PARAMETER;
 
-	if (!find_guid(guid_string, &wblock))
-		return AE_ERROR;
-
 	block = &wblock->gblock;
-	handle = wblock->handle;
+	handle = wblock->acpi_device->handle;
 
 	if (block->instance_count < instance)
 		return AE_BAD_PARAMETER;
@@ -262,6 +277,9 @@ struct acpi_buffer *out)
 	wq_params[0].type = ACPI_TYPE_INTEGER;
 	wq_params[0].integer.value = instance;
 
+	if (instance == 0 && wblock->read_takes_no_args)
+		input.count = 0;
+
 	/*
 	 * If ACPI_WMI_EXPENSIVE, call the relevant WCxx method first to
 	 * enable collection.
@@ -294,8 +312,59 @@ struct acpi_buffer *out)
 
 	return status;
 }
+
+/**
+ * wmi_query_block - Return contents of a WMI block (deprecated)
+ * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
+ * @instance: Instance index
+ * &out: Empty buffer to return the contents of the data block to
+ *
+ * Return the contents of an ACPI-WMI data block to a buffer
+ */
+acpi_status wmi_query_block(const char *guid_string, u8 instance,
+			    struct acpi_buffer *out)
+{
+	struct wmi_block *wblock;
+
+	if (!guid_string)
+		return AE_BAD_PARAMETER;
+
+	if (!find_guid(guid_string, &wblock))
+		return AE_ERROR;
+
+	return __query_block(wblock, instance, out);
+}
 EXPORT_SYMBOL_GPL(wmi_query_block);
 
+union acpi_object *wmidev_block_query(struct wmi_device *wdev, u8 instance)
+{
+	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct wmi_block *wblock = container_of(wdev, struct wmi_block, dev);
+
+	if (ACPI_FAILURE(__query_block(wblock, instance, &out)))
+		return NULL;
+
+	return (union acpi_object *)out.pointer;
+}
+EXPORT_SYMBOL_GPL(wmidev_block_query);
+
+struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev,
+					 const char *guid_string)
+{
+	struct wmi_block *this_wb = container_of(wdev, struct wmi_block, dev);
+	struct wmi_block *other_wb;
+
+	if (!find_guid(guid_string, &other_wb))
+		return NULL;
+
+	if (other_wb->acpi_device != this_wb->acpi_device)
+		return NULL;
+
+	get_device(&other_wb->dev.dev);
+	return &other_wb->dev;
+}
+EXPORT_SYMBOL_GPL(wmidev_get_other_guid);
+
 /**
  * wmi_set_block - Write to a WMI block
  * @guid_string: 36 char string of the form fa50ff2b-f2e8-45de-83fa-65417f2f49ba
@@ -305,7 +374,7 @@ EXPORT_SYMBOL_GPL(wmi_query_block);
  * Write the contents of the input buffer to an ACPI-WMI data block
  */
 acpi_status wmi_set_block(const char *guid_string, u8 instance,
-const struct acpi_buffer *in)
+			  const struct acpi_buffer *in)
 {
 	struct guid_block *block = NULL;
 	struct wmi_block *wblock = NULL;
@@ -321,7 +390,7 @@ const struct acpi_buffer *in)
 		return AE_ERROR;
 
 	block = &wblock->gblock;
-	handle = wblock->handle;
+	handle = wblock->acpi_device->handle;
 
 	if (block->instance_count < instance)
 		return AE_BAD_PARAMETER;
@@ -352,9 +421,10 @@ EXPORT_SYMBOL_GPL(wmi_set_block);
 static void wmi_dump_wdg(const struct guid_block *g)
 {
 	pr_info("%pUL:\n", g->guid);
-	pr_info("\tobject_id: %c%c\n", g->object_id[0], g->object_id[1]);
-	pr_info("\tnotify_id: %02X\n", g->notify_id);
-	pr_info("\treserved: %02X\n", g->reserved);
+	if (g->flags & ACPI_WMI_EVENT)
+		pr_info("\tnotify_id: 0x%02X\n", g->notify_id);
+	else
+		pr_info("\tobject_id: %2pE\n", g->object_id);
 	pr_info("\tinstance_count: %d\n", g->instance_count);
 	pr_info("\tflags: %#x", g->flags);
 	if (g->flags) {
@@ -525,8 +595,8 @@ acpi_status wmi_get_event_data(u32 event, struct acpi_buffer *out)
 
 		if ((gblock->flags & ACPI_WMI_EVENT) &&
 			(gblock->notify_id == event))
-			return acpi_evaluate_object(wblock->handle, "_WED",
-				&input, out);
+			return acpi_evaluate_object(wblock->acpi_device->handle,
+				"_WED", &input, out);
 	}
 
 	return AE_NOT_FOUND;
@@ -545,99 +615,320 @@ bool wmi_has_guid(const char *guid_string)
 }
 EXPORT_SYMBOL_GPL(wmi_has_guid);
 
+static struct wmi_block *dev_to_wblock(struct device *dev)
+{
+	return container_of(dev, struct wmi_block, dev.dev);
+}
+
+static struct wmi_device *dev_to_wdev(struct device *dev)
+{
+	return container_of(dev, struct wmi_device, dev);
+}
+
 /*
  * sysfs interface
  */
 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
 			     char *buf)
 {
-	struct wmi_block *wblock;
-
-	wblock = dev_get_drvdata(dev);
-	if (!wblock) {
-		strcat(buf, "\n");
-		return strlen(buf);
-	}
+	struct wmi_block *wblock = dev_to_wblock(dev);
 
 	return sprintf(buf, "wmi:%pUL\n", wblock->gblock.guid);
 }
 static DEVICE_ATTR_RO(modalias);
 
+static ssize_t guid_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	return sprintf(buf, "%pUL\n", wblock->gblock.guid);
+}
+static DEVICE_ATTR_RO(guid);
+
+static ssize_t instance_count_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	return sprintf(buf, "%d\n", (int)wblock->gblock.instance_count);
+}
+static DEVICE_ATTR_RO(instance_count);
+
+static ssize_t expensive_show(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	return sprintf(buf, "%d\n",
+		       (wblock->gblock.flags & ACPI_WMI_EXPENSIVE) != 0);
+}
+static DEVICE_ATTR_RO(expensive);
+
 static struct attribute *wmi_attrs[] = {
 	&dev_attr_modalias.attr,
+	&dev_attr_guid.attr,
+	&dev_attr_instance_count.attr,
+	&dev_attr_expensive.attr,
 	NULL,
 };
 ATTRIBUTE_GROUPS(wmi);
 
-static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+static ssize_t notify_id_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
 {
-	char guid_string[37];
+	struct wmi_block *wblock = dev_to_wblock(dev);
 
-	struct wmi_block *wblock;
+	return sprintf(buf, "%02X\n", (unsigned int)wblock->gblock.notify_id);
+}
+static DEVICE_ATTR_RO(notify_id);
+
+static struct attribute *wmi_event_attrs[] = {
+	&dev_attr_notify_id.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(wmi_event);
+
+static ssize_t object_id_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	return sprintf(buf, "%c%c\n", wblock->gblock.object_id[0],
+		       wblock->gblock.object_id[1]);
+}
+static DEVICE_ATTR_RO(object_id);
+
+static ssize_t setable_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct wmi_device *wdev = dev_to_wdev(dev);
+
+	return sprintf(buf, "%d\n", (int)wdev->setable);
+}
+static DEVICE_ATTR_RO(setable);
 
-	if (add_uevent_var(env, "MODALIAS="))
+static struct attribute *wmi_data_attrs[] = {
+	&dev_attr_object_id.attr,
+	&dev_attr_setable.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(wmi_data);
+
+static struct attribute *wmi_method_attrs[] = {
+	&dev_attr_object_id.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(wmi_method);
+
+static int wmi_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	if (add_uevent_var(env, "MODALIAS=wmi:%pUL", wblock->gblock.guid))
 		return -ENOMEM;
 
-	wblock = dev_get_drvdata(dev);
-	if (!wblock)
+	if (add_uevent_var(env, "WMI_GUID=%pUL", wblock->gblock.guid))
 		return -ENOMEM;
 
-	sprintf(guid_string, "%pUL", wblock->gblock.guid);
+	return 0;
+}
 
-	strcpy(&env->buf[env->buflen - 1], "wmi:");
-	memcpy(&env->buf[env->buflen - 1 + 4], guid_string, 36);
-	env->buflen += 40;
+static void wmi_dev_release(struct device *dev)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+
+	kfree(wblock);
+}
+
+static int wmi_dev_match(struct device *dev, struct device_driver *driver)
+{
+	struct wmi_driver *wmi_driver =
+		container_of(driver, struct wmi_driver, driver);
+	struct wmi_block *wblock = dev_to_wblock(dev);
+	const struct wmi_device_id *id = wmi_driver->id_table;
+
+	while (id->guid_string) {
+		uuid_le driver_guid;
+
+		if (WARN_ON(uuid_le_to_bin(id->guid_string, &driver_guid)))
+			continue;
+		if (!memcmp(&driver_guid, wblock->gblock.guid, 16))
+			return 1;
+
+		id++;
+	}
 
 	return 0;
 }
 
-static void wmi_dev_free(struct device *dev)
+static int wmi_dev_probe(struct device *dev)
 {
-	struct wmi_block *wmi_block = container_of(dev, struct wmi_block, dev);
+	struct wmi_block *wblock = dev_to_wblock(dev);
+	struct wmi_driver *wdriver =
+		container_of(dev->driver, struct wmi_driver, driver);
+	int ret = 0;
+
+	if (ACPI_FAILURE(wmi_method_enable(wblock, 1)))
+		dev_warn(dev, "failed to enable device -- probing anyway\n");
+
+	if (wdriver->probe) {
+		ret = wdriver->probe(dev_to_wdev(dev));
+		if (ret != 0 && ACPI_FAILURE(wmi_method_enable(wblock, 0)))
+			dev_warn(dev, "failed to disable device\n");
+	}
+
+	return ret;
+}
+
+static int wmi_dev_remove(struct device *dev)
+{
+	struct wmi_block *wblock = dev_to_wblock(dev);
+	struct wmi_driver *wdriver =
+		container_of(dev->driver, struct wmi_driver, driver);
+	int ret = 0;
+
+	if (wdriver->remove)
+		ret = wdriver->remove(dev_to_wdev(dev));
+
+	if (ACPI_FAILURE(wmi_method_enable(wblock, 0)))
+		dev_warn(dev, "failed to disable device\n");
 
-	kfree(wmi_block);
+	return ret;
 }
 
-static struct class wmi_class = {
+static struct class wmi_bus_class = {
+	.name = "wmi_bus",
+};
+
+static struct bus_type wmi_bus_type = {
 	.name = "wmi",
-	.dev_release = wmi_dev_free,
-	.dev_uevent = wmi_dev_uevent,
 	.dev_groups = wmi_groups,
+	.match = wmi_dev_match,
+	.uevent = wmi_dev_uevent,
+	.probe = wmi_dev_probe,
+	.remove = wmi_dev_remove,
+};
+
+static struct device_type wmi_type_event = {
+	.name = "event",
+	.groups = wmi_event_groups,
+	.release = wmi_dev_release,
 };
 
-static int wmi_create_device(const struct guid_block *gblock,
-			     struct wmi_block *wblock, acpi_handle handle)
+static struct device_type wmi_type_method = {
+	.name = "method",
+	.groups = wmi_method_groups,
+	.release = wmi_dev_release,
+};
+
+static struct device_type wmi_type_data = {
+	.name = "data",
+	.groups = wmi_data_groups,
+	.release = wmi_dev_release,
+};
+
+static int wmi_create_device(struct device *wmi_bus_dev,
+			     const struct guid_block *gblock,
+			     struct wmi_block *wblock,
+			     struct acpi_device *device)
 {
-	wblock->dev.class = &wmi_class;
+	struct acpi_device_info *info;
+	char method[5];
+	int result;
 
-	dev_set_name(&wblock->dev, "%pUL", gblock->guid);
+	if (gblock->flags & ACPI_WMI_EVENT) {
+		wblock->dev.dev.type = &wmi_type_event;
+		goto out_init;
+	}
 
-	dev_set_drvdata(&wblock->dev, wblock);
+	if (gblock->flags & ACPI_WMI_METHOD) {
+		wblock->dev.dev.type = &wmi_type_method;
+		goto out_init;
+	}
 
-	return device_register(&wblock->dev);
+	/*
+	 * Data Block Query Control Method (WQxx by convention) is
+	 * required per the WMI documentation. If it is not present,
+	 * we ignore this data block.
+	 */
+	strcpy(method, "WQ");
+	strncat(method, wblock->gblock.object_id, 2);
+	result = get_subobj_info(device->handle, method, &info);
+
+	if (result) {
+		dev_warn(wmi_bus_dev,
+			 "%s data block query control method not found",
+			 method);
+		return result;
+	}
+
+	wblock->dev.dev.type = &wmi_type_data;
+
+	/*
+	 * The Microsoft documentation specifically states:
+	 *
+	 *   Data blocks registered with only a single instance
+	 *   can ignore the parameter.
+	 *
+	 * ACPICA will get mad at us if we call the method with the wrong number
+	 * of arguments, so check what our method expects.  (On some Dell
+	 * laptops, WQxx may not be a method at all.)
+	 */
+	if (info->type != ACPI_TYPE_METHOD || info->param_count == 0)
+		wblock->read_takes_no_args = true;
+
+	kfree(info);
+
+	strcpy(method, "WS");
+	strncat(method, wblock->gblock.object_id, 2);
+	result = get_subobj_info(device->handle, method, NULL);
+
+	if (result == 0)
+		wblock->dev.setable = true;
+
+ out_init:
+	wblock->dev.dev.bus = &wmi_bus_type;
+	wblock->dev.dev.parent = wmi_bus_dev;
+
+	dev_set_name(&wblock->dev.dev, "%pUL", gblock->guid);
+
+	device_initialize(&wblock->dev.dev);
+
+	return 0;
 }
 
-static void wmi_free_devices(void)
+static void wmi_free_devices(struct acpi_device *device)
 {
 	struct wmi_block *wblock, *next;
 
 	/* Delete devices for all the GUIDs */
 	list_for_each_entry_safe(wblock, next, &wmi_block_list, list) {
-		list_del(&wblock->list);
-		if (wblock->dev.class)
-			device_unregister(&wblock->dev);
-		else
-			kfree(wblock);
+		if (wblock->acpi_device == device) {
+			list_del(&wblock->list);
+			device_unregister(&wblock->dev.dev);
+		}
 	}
 }
 
-static bool guid_already_parsed(const char *guid_string)
+static bool guid_already_parsed(struct acpi_device *device,
+				const u8 *guid)
 {
 	struct wmi_block *wblock;
 
-	list_for_each_entry(wblock, &wmi_block_list, list)
-		if (memcmp(wblock->gblock.guid, guid_string, 16) == 0)
+	list_for_each_entry(wblock, &wmi_block_list, list) {
+		if (memcmp(wblock->gblock.guid, guid, 16) == 0) {
+			/*
+			 * Because we historically didn't track the relationship
+			 * between GUIDs and ACPI nodes, we don't know whether
+			 * we need to suppress GUIDs that are unique on a
+			 * given node but duplicated across nodes.
+			 */
+			dev_warn(&device->dev, "duplicate WMI GUID %pUL (first instance was on %s)\n",
+				 guid, dev_name(&wblock->acpi_device->dev));
 			return true;
+		}
+	}
 
 	return false;
 }
@@ -645,17 +936,17 @@ static bool guid_already_parsed(const char *guid_string)
 /*
  * Parse the _WDG method for the GUID data blocks
  */
-static int parse_wdg(acpi_handle handle)
+static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device)
 {
 	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
-	union acpi_object *obj;
 	const struct guid_block *gblock;
-	struct wmi_block *wblock;
+	struct wmi_block *wblock, *next;
+	union acpi_object *obj;
 	acpi_status status;
-	int retval;
+	int retval = 0;
 	u32 i, total;
 
-	status = acpi_evaluate_object(handle, "_WDG", NULL, &out);
+	status = acpi_evaluate_object(device->handle, "_WDG", NULL, &out);
 	if (ACPI_FAILURE(status))
 		return -ENXIO;
 
@@ -675,25 +966,28 @@ static int parse_wdg(acpi_handle handle)
 		if (debug_dump_wdg)
 			wmi_dump_wdg(&gblock[i]);
 
+		/*
+		 * Some WMI devices, like those for nVidia hooks, have a
+		 * duplicate GUID. It's not clear what we should do in this
+		 * case yet, so for now, we'll just ignore the duplicate
+		 * for device creation.
+		 */
+		if (guid_already_parsed(device, gblock[i].guid))
+			continue;
+
 		wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
-		if (!wblock)
-			return -ENOMEM;
+		if (!wblock) {
+			retval = -ENOMEM;
+			break;
+		}
 
-		wblock->handle = handle;
+		wblock->acpi_device = device;
 		wblock->gblock = gblock[i];
 
-		/*
-		  Some WMI devices, like those for nVidia hooks, have a
-		  duplicate GUID. It's not clear what we should do in this
-		  case yet, so for now, we'll just ignore the duplicate
-		  for device creation.
-		*/
-		if (!guid_already_parsed(gblock[i].guid)) {
-			retval = wmi_create_device(&gblock[i], wblock, handle);
-			if (retval) {
-				wmi_free_devices();
-				goto out_free_pointer;
-			}
+		retval = wmi_create_device(wmi_bus_dev, &gblock[i], wblock, device);
+		if (retval) {
+			kfree(wblock);
+			continue;
 		}
 
 		list_add_tail(&wblock->list, &wmi_block_list);
@@ -704,11 +998,27 @@ static int parse_wdg(acpi_handle handle)
 		}
 	}
 
-	retval = 0;
+	/*
+	 * Now that all of the devices are created, add them to the
+	 * device tree and probe subdrivers.
+	 */
+	list_for_each_entry_safe(wblock, next, &wmi_block_list, list) {
+		if (wblock->acpi_device != device)
+			continue;
+
+		retval = device_add(&wblock->dev.dev);
+		if (retval) {
+			dev_err(wmi_bus_dev, "failed to register %pULL\n",
+				wblock->gblock.guid);
+			if (debug_event)
+				wmi_method_enable(wblock, 0);
+			list_del(&wblock->list);
+			put_device(&wblock->dev.dev);
+		}
+	}
 
 out_free_pointer:
 	kfree(out.pointer);
-
 	return retval;
 }
 
@@ -756,67 +1066,168 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
 	}
 }
 
-static void acpi_wmi_notify(struct acpi_device *device, u32 event)
+static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
+				    void *context)
 {
 	struct guid_block *block;
 	struct wmi_block *wblock;
 	struct list_head *p;
+	bool found_it = false;
 
 	list_for_each(p, &wmi_block_list) {
 		wblock = list_entry(p, struct wmi_block, list);
 		block = &wblock->gblock;
 
-		if ((block->flags & ACPI_WMI_EVENT) &&
-			(block->notify_id == event)) {
-			if (wblock->handler)
-				wblock->handler(event, wblock->handler_data);
-			if (debug_event) {
-				pr_info("DEBUG Event GUID: %pUL\n",
-					wblock->gblock.guid);
-			}
-
-			acpi_bus_generate_netlink_event(
-				device->pnp.device_class, dev_name(&device->dev),
-				event, 0);
+		if (wblock->acpi_device->handle == handle &&
+		    (block->flags & ACPI_WMI_EVENT) &&
+		    (block->notify_id == event))
+		{
+			found_it = true;
 			break;
 		}
 	}
+
+	if (!found_it)
+		return;
+
+	/* If a driver is bound, then notify the driver. */
+	if (wblock->dev.dev.driver) {
+		struct wmi_driver *driver;
+		struct acpi_object_list input;
+		union acpi_object params[1];
+		struct acpi_buffer evdata = { ACPI_ALLOCATE_BUFFER, NULL };
+		acpi_status status;
+
+		driver = container_of(wblock->dev.dev.driver,
+				      struct wmi_driver, driver);
+
+		input.count = 1;
+		input.pointer = params;
+		params[0].type = ACPI_TYPE_INTEGER;
+		params[0].integer.value = event;
+
+		status = acpi_evaluate_object(wblock->acpi_device->handle,
+					      "_WED", &input, &evdata);
+		if (ACPI_FAILURE(status)) {
+			dev_warn(&wblock->dev.dev,
+				 "failed to get event data\n");
+			return;
+		}
+
+		if (driver->notify)
+			driver->notify(&wblock->dev,
+				       (union acpi_object *)evdata.pointer);
+
+		kfree(evdata.pointer);
+	} else if (wblock->handler) {
+		/* Legacy handler */
+		wblock->handler(event, wblock->handler_data);
+	}
+
+	if (debug_event) {
+		pr_info("DEBUG Event GUID: %pUL\n",
+			wblock->gblock.guid);
+	}
+
+	acpi_bus_generate_netlink_event(
+		wblock->acpi_device->pnp.device_class,
+		dev_name(&wblock->dev.dev),
+		event, 0);
+
 }
 
-static int acpi_wmi_remove(struct acpi_device *device)
+static int acpi_wmi_remove(struct platform_device *device)
 {
-	acpi_remove_address_space_handler(device->handle,
+	struct acpi_device *acpi_device = ACPI_COMPANION(&device->dev);
+
+	acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY,
+				   acpi_wmi_notify_handler);
+	acpi_remove_address_space_handler(acpi_device->handle,
 				ACPI_ADR_SPACE_EC, &acpi_wmi_ec_space_handler);
-	wmi_free_devices();
+	wmi_free_devices(acpi_device);
+	device_unregister((struct device *)dev_get_drvdata(&device->dev));
 
 	return 0;
 }
 
-static int acpi_wmi_add(struct acpi_device *device)
+static int acpi_wmi_probe(struct platform_device *device)
 {
+	struct acpi_device *acpi_device;
+	struct device *wmi_bus_dev;
 	acpi_status status;
 	int error;
 
-	status = acpi_install_address_space_handler(device->handle,
+	acpi_device = ACPI_COMPANION(&device->dev);
+	if (!acpi_device) {
+		dev_err(&device->dev, "ACPI companion is missing\n");
+		return -ENODEV;
+	}
+
+	status = acpi_install_address_space_handler(acpi_device->handle,
 						    ACPI_ADR_SPACE_EC,
 						    &acpi_wmi_ec_space_handler,
 						    NULL, NULL);
 	if (ACPI_FAILURE(status)) {
-		pr_err("Error installing EC region handler\n");
+		dev_err(&device->dev, "Error installing EC region handler\n");
 		return -ENODEV;
 	}
 
-	error = parse_wdg(device->handle);
+	status = acpi_install_notify_handler(acpi_device->handle,
+					     ACPI_DEVICE_NOTIFY,
+					     acpi_wmi_notify_handler,
+					     NULL);
+	if (ACPI_FAILURE(status)) {
+		dev_err(&device->dev, "Error installing notify handler\n");
+		error = -ENODEV;
+		goto err_remove_ec_handler;
+	}
+
+	wmi_bus_dev = device_create(&wmi_bus_class, &device->dev, MKDEV(0, 0),
+				    NULL, "wmi_bus-%s", dev_name(&device->dev));
+	if (IS_ERR(wmi_bus_dev)) {
+		error = PTR_ERR(wmi_bus_dev);
+		goto err_remove_notify_handler;
+	}
+	dev_set_drvdata(&device->dev, wmi_bus_dev);
+
+	error = parse_wdg(wmi_bus_dev, acpi_device);
 	if (error) {
-		acpi_remove_address_space_handler(device->handle,
-						  ACPI_ADR_SPACE_EC,
-						  &acpi_wmi_ec_space_handler);
 		pr_err("Failed to parse WDG method\n");
-		return error;
+		goto err_remove_busdev;
 	}
 
 	return 0;
+
+err_remove_busdev:
+	device_unregister(wmi_bus_dev);
+
+err_remove_notify_handler:
+	acpi_remove_notify_handler(acpi_device->handle, ACPI_DEVICE_NOTIFY,
+				   acpi_wmi_notify_handler);
+
+err_remove_ec_handler:
+	acpi_remove_address_space_handler(acpi_device->handle,
+					  ACPI_ADR_SPACE_EC,
+					  &acpi_wmi_ec_space_handler);
+
+	return error;
+}
+
+int __must_check __wmi_driver_register(struct wmi_driver *driver,
+				       struct module *owner)
+{
+	driver->driver.owner = owner;
+	driver->driver.bus = &wmi_bus_type;
+
+	return driver_register(&driver->driver);
 }
+EXPORT_SYMBOL(__wmi_driver_register);
+
+void wmi_driver_unregister(struct wmi_driver *driver)
+{
+	driver_unregister(&driver->driver);
+}
+EXPORT_SYMBOL(wmi_driver_unregister);
 
 static int __init acpi_wmi_init(void)
 {
@@ -825,27 +1236,36 @@ static int __init acpi_wmi_init(void)
 	if (acpi_disabled)
 		return -ENODEV;
 
-	error = class_register(&wmi_class);
+	error = class_register(&wmi_bus_class);
 	if (error)
 		return error;
 
-	error = acpi_bus_register_driver(&acpi_wmi_driver);
+	error = bus_register(&wmi_bus_type);
+	if (error)
+		goto err_unreg_class;
+
+	error = platform_driver_register(&acpi_wmi_driver);
 	if (error) {
 		pr_err("Error loading mapper\n");
-		class_unregister(&wmi_class);
-		return error;
+		goto err_unreg_bus;
 	}
 
-	pr_info("Mapper loaded\n");
 	return 0;
+
+err_unreg_class:
+	class_unregister(&wmi_bus_class);
+
+err_unreg_bus:
+	bus_unregister(&wmi_bus_type);
+
+	return error;
 }
 
 static void __exit acpi_wmi_exit(void)
 {
-	acpi_bus_unregister_driver(&acpi_wmi_driver);
-	class_unregister(&wmi_class);
-
-	pr_info("Mapper unloaded\n");
+	platform_driver_unregister(&acpi_wmi_driver);
+	class_unregister(&wmi_bus_class);
+	bus_unregister(&wmi_bus_type);
 }
 
 subsys_initcall(acpi_wmi_init);

include/linux/wmi.h

+/*
+ * wmi.h - ACPI WMI interface
+ *
+ * Copyright (c) 2015 Andrew Lutomirski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _LINUX_WMI_H
+#define _LINUX_WMI_H
+
+#include <linux/device.h>
+#include <linux/acpi.h>
+
+struct wmi_device {
+	struct device dev;
+
+	 /* True for data blocks implementing the Set Control Method */
+	bool setable;
+};
+
+/* Caller must kfree the result. */
+extern union acpi_object *wmidev_block_query(struct wmi_device *wdev,
+					     u8 instance);
+
+/* Gets another device on the same bus.  Caller must put_device the result. */
+extern struct wmi_device *wmidev_get_other_guid(struct wmi_device *wdev,
+						const char *guid_string);
+
+struct wmi_device_id {
+	const char *guid_string;
+};
+
+struct wmi_driver {
+	struct device_driver driver;
+	const struct wmi_device_id *id_table;
+
+	int (*probe)(struct wmi_device *wdev);
+	int (*remove)(struct wmi_device *wdev);
+	void (*notify)(struct wmi_device *device, union acpi_object *data);
+};
+
+extern int __must_check __wmi_driver_register(struct wmi_driver *driver,
+					      struct module *owner);
+extern void wmi_driver_unregister(struct wmi_driver *driver);
+#define wmi_driver_register(driver) __wmi_driver_register((driver), THIS_MODULE)
+
+#define module_wmi_driver(__wmi_driver) \
+	module_driver(__wmi_driver, wmi_driver_register, \
+		      wmi_driver_unregister)
+
+#endif